DEV Community: Sergey Ilin

Energy-Based Scheduling: Align Your Calendar to Peak Hours

Sergey Ilin — Fri, 22 May 2026 06:00:06 +0000

Energy-Based Scheduling: Align Your Calendar to Peak Hours

Originally published on Schedule Calendar Blog

Scheduling based on available hours assumes all hours are equal. They are not. Energy-based scheduling matches the hardest work to your peak concentration window — which changes the entire character of the day.

What energy-based scheduling means

Energy-based scheduling is the practice of matching the type of work to the quality of mental energy available at different times of day. Deep, cognitively demanding work goes to your peak window. Administrative and shallow tasks go to low-energy periods. Collaborative and social work — meetings, calls, interviews — goes to the middle.

The alternative — scheduling work by availability, filling whatever gaps appear — treats all hours as interchangeable. The result is difficult thinking done in depleted states, which produces slower and lower-quality output.

Finding your natural concentration peak

Most people have a rough sense of when they do their best thinking. A one-week experiment makes it explicit: note your energy and focus quality at three points in the day — morning, midday, late afternoon. After a week, a pattern usually emerges.

For most people, peak concentration falls in the morning. For a significant minority, it is mid-morning to early afternoon, or even late afternoon. The point is not to follow a generic rule but to identify your actual pattern.

Practical test: when during the week do you write or code most fluidly? When do you re-read the same sentence three times? The answers usually reveal your peak and trough more clearly than any personality framework.

How to apply energy-based scheduling in Google Calendar

Peak hours: deep work blocks

Once you know your peak window, protect it for deep work. Create a recurring block at that time, mark it Busy, and treat it as structurally equivalent to a client meeting — not optional.

Middle energy: meetings and collaboration

Schedule calls, syncs, and collaborative sessions during your middle-energy period. Social and verbal tasks do not require the same cognitive load as deep thinking, and they often energize rather than deplete during moderate-energy periods.

Low energy: admin and shallow tasks

Batch administrative work — email, expense reports, Slack clearing, scheduling — into your low-energy period. These tasks can be done with less mental bandwidth and are well-suited for the hour when deep output is not realistic.

Key takeaways:

Identify your actual cognitive peak through a one-week observation.
Protect peak hours for deep work, not for meetings or email.
Batch admin and shallow tasks in low-energy windows.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

Time Blocking Templates for Different Work Styles

Sergey Ilin — Thu, 21 May 2026 06:00:11 +0000

Time Blocking Templates for Different Work Styles

Originally published on Schedule Calendar Blog

Not all work schedules look the same. A time blocking template that works for a software engineer with long focus windows does not work for a manager with five calls before noon. Here are four templates adapted to different realities.

Why templates help

Starting a time blocking system from scratch means making dozens of small decisions each week: when do I block deep work, how long should each block be, where do I put email and admin, how do I handle the days that are mostly meetings?

A template provides a starting pattern — not a fixed rule, but a default structure to adapt. Most people modify their template significantly within a month, but having one at the start is faster than building from nothing.

Template 1: The maker schedule

Morning: 2–3 hour deep work block

This template works for roles with significant output work: engineers, writers, designers, researchers. The goal is a long morning block of uninterrupted focus, with all meetings and communication batched to the afternoon.

Midday: shallow work batch

A practical version: 8:00–10:30 deep work (Busy), 10:30–11:00 email/Slack batch, 11:00–12:00 meetings, 12:00–13:00 lunch, 13:00–17:00 available for meetings, with a 30-min wrap-up buffer at 16:30.

Afternoon: meetings only

The critical rule: the morning block is non-negotiable except for genuine emergencies. Everything else fits around it.

Template 2: The manager schedule

Morning: 1-on-1s and team syncs

Managers typically have less control over when meetings happen. This template accepts that reality and protects one reliable focus window rather than trying to minimize meetings.

Midday: a single focus block

A practical version: 9:00–12:00 available for team meetings (clustered), 12:00–13:30 protected focus block (Busy), 13:30–17:00 meetings and availability for decisions. The midday block is used for thinking that requires no interruption: planning, writing, reviewing strategy.

Afternoon: strategic decisions

The key: cluster meetings into the morning to create a predictable afternoon block that does not move.

Template 3: The remote worker

Morning: async communication catch-up

Remote work often means a mix of sync and async communication across time zones. This template front-loads async catch-up to clear communication overhead before the focus block begins.

Mid-morning: deep work block

A practical version: 8:00–9:00 async catch-up (email, Slack backlog, doc comments), 9:00–11:30 deep work block (Busy, notifications off), 11:30–12:30 lunch and light admin, 13:00–16:00 meetings and collaborative work.

Afternoon: availability window

The advantage: by 9am, the communication backlog is handled and the focus block starts with a clear head.

Key takeaways:

Makers: protect a long morning block; cluster meetings in the afternoon.
Managers: accept the meeting load, protect one midday focus block.
Remote workers: clear async catch-up before the focus block begins.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

5 Time Blocking Mistakes That Kill Productivity

Sergey Ilin — Thu, 21 May 2026 06:00:08 +0000

5 Time Blocking Mistakes That Kill Productivity

Originally published on Schedule Calendar Blog

Time blocking works reliably for some people and collapses immediately for others. The difference is almost never motivation — it is a small number of structural mistakes that make the system fragile from the start.

Mistake 1: Blocking 100% of your hours

The most common time blocking mistake is filling the entire calendar. Every hour gets a label. The system looks productive from the outside.

In practice, a 100%-blocked calendar is one unexpected disruption away from total collapse. A meeting runs long, a task takes twice as long, someone stops by — and suddenly the plan for the day is fiction. Blocking 60–70% of available hours leaves enough white space to absorb the unexpected without destroying the structure.

Mistake 2: Using vague block names

A block named 'Work' or 'Focus time' or 'Project' tells you nothing when you sit down to start. You still need to decide what to do, which means the block offers no real accountability.

Specific names change the dynamic. 'Write introduction for Q3 report' answers the question before you ask it. When you are tempted to do something else, the block name is a mild but real commitment. When you finish, there is a clear sense of completion.

Quick fix: any block whose name does not answer 'what exactly happens here?' is not specific enough. Rename it before the day starts. Takes 10 seconds and changes the psychology of starting.

Mistake 3: Leaving blocks as Free

A focus block set to Free accepts meeting invites without resistance. Someone looking for a gap in your calendar finds it, schedules there, and the block is gone before you notice.

Set focus blocks to Busy. This is a single toggle in Google Calendar. It does not prevent you from accepting a meeting if you choose to — it just makes the default 'this time is taken' rather than 'this time is open.'

Key takeaways:

Block 60–70% of your time, not 100% — leave room to absorb surprises.
Specific block names ('Draft intro for Q3') beat categories ('Work').
Mark blocks Busy so meetings don't land inside them by default.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

How to Protect Morning Focus Time With Calendar Blocks

Sergey Ilin — Wed, 20 May 2026 11:03:57 +0000

How to Protect Morning Focus Time With Calendar Blocks

Originally published on Schedule Calendar Blog

The first hours of the day are often the most cognitively available. Most people spend them on email. A morning focus block reserves that window for the work that most needs your full attention.

Why mornings matter for focused work

Willpower and concentration are not fixed across the day. For most people, decision fatigue, mental residue from earlier tasks, and the accumulation of communication demands mean that cognitive capacity decreases as the day progresses.

This is not universal — some people genuinely peak in the afternoon. But for the majority, the hours before the first meeting, before the first batch of messages, and before the first interruption represent the highest-quality working time available.

The problem with leaving mornings unprotected

Without a morning block, the day usually begins reactively. You check email, respond to something urgent, catch up on what happened overnight, and then notice that your first meeting is in 20 minutes. The deep work you intended to do gets pushed to after lunch, when it competes with afternoon meetings and diminishing energy.

This pattern repeats. The work keeps getting moved. The calendar shows time available, but the combination of fatigue, fragmentation, and accumulated shallow tasks means that time is rarely usable.

Useful test: for one week, track what you actually do in the first 60 minutes of your workday. If the answer is mostly email, Slack, and reactive tasks — your mornings are unprotected and available to be claimed.

Setting up a morning focus block in Google Calendar

Create a recurring event at the start of your workday. Give it a specific name — not 'Morning block' but something tied to your current major project. Set it to Busy. Choose a consistent length: 60–90 minutes is a sustainable starting point; 120 minutes is better if your schedule allows it.

Keep the block's start time realistic. If your first regular meeting is at 9am, a 7am block may not be sustainable. An 8am block with the first meeting at 9:30 is more durable than an ambitious earlier start that breaks after one week.

Key takeaways:

Reserve the first 60–120 min before meetings for focused work.
Name the block specifically — tied to a current project.
Set status to Busy; keep the start time realistic to sustain.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

Time Blocking When Your Day Is Full of Meetings

Sergey Ilin — Wed, 20 May 2026 11:03:55 +0000

Time Blocking When Your Day Is Full of Meetings

Originally published on Schedule Calendar Blog

A meeting-heavy calendar does not make time blocking impossible — it makes it more necessary. The challenge is finding the right windows and making the blocks durable enough to survive the week.

The meeting-heavy calendar problem

When meetings occupy 60–70% of your day, the instinct is to put focused work in whatever gaps remain. The problem: those gaps are irregular, often short, and surrounded by context switches that make deep work nearly impossible.

A 45-minute window between a 10am standup and an 11am planning call looks like time on the calendar. In practice, you need 10 minutes to finish the previous conversation mentally, and 5 minutes to get ready for the next one. That leaves 30 minutes — which is not enough for most cognitively demanding tasks.

Auditing your meeting load before blocking

Before adding focus blocks to a busy calendar, review what is already there. Which meetings are actually required? Which could be an email or a shared doc? Which recurring calls have outlived their purpose?

Even removing one 60-minute weekly meeting creates a reliable window that did not exist before. One removed meeting is worth more to your focus capacity than any number of blocks squeezed into existing gaps.

Useful audit question for each recurring meeting: if this meeting were cancelled, what would actually break? If the answer is 'nothing immediate', that meeting is a candidate for removal or conversion to async updates.

Where to place focus blocks in a meeting-heavy week

Morning anchor blocks

A morning anchor block runs before your first meeting of the day. Even 60 minutes before a 9am standup creates a protected window for the work that matters most. This requires starting earlier, but many people find the uninterrupted morning worth the trade.

Afternoon consolidation blocks

Afternoon consolidation blocks group shallow tasks — email responses, document reviews, quick decisions — into one window. This prevents small tasks from occupying the brief gaps between morning meetings and keeps your best hours clear.

Meeting-free half-days

A meeting-free half-day (one morning or afternoon per week with no meetings) is the most powerful single change for people with dense schedules. It requires coordination with your team but creates a reliable container for deep work that gaps between meetings cannot provide.

Key takeaways:

Audit meetings before adding blocks — remove what's unnecessary.
Morning anchor blocks before the first meeting protect peak hours.
One meeting-free half-day outperforms multiple small gaps.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

Time Blocking vs. To-Do Lists: Which Works Better?

Sergey Ilin — Wed, 20 May 2026 11:03:17 +0000

Time Blocking vs. To-Do Lists: Which Works Better?

Originally published on Schedule Calendar Blog

The question is not whether to use a to-do list or time blocking. They solve different problems. Understanding what each does well is how you build a system that works on both busy and calm days.

What a to-do list does well

A to-do list is a capture tool. It holds everything that needs to happen without requiring you to decide when. This is its strength: low friction to add items, clear view of what is outstanding, simple prioritization by moving items up or down.

The weakness appears during the day. A to-do list tells you what needs doing but not when you have time to do it, how long each item takes relative to your available windows, or whether your actual calendar leaves any realistic room for the work.

What time blocking does well

A calendar block gives a task a home in time. It answers the question: not just what needs to happen, but when and for how long. A block makes the work visible alongside meetings, which reveals whether there is actually room in the day to do what is on the list.

The weakness: maintaining a tightly blocked calendar takes effort. Items you did not anticipate displace blocks. And blocking every task can create rigidity that makes the week feel more stressful, not less.

The insight: use a to-do list to capture everything, and use calendar blocks to decide which items will actually happen this week. The list is infinite; the calendar is finite. Putting tasks on the calendar forces you to make real tradeoffs.

A practical combined system

Weekly: turn the list into calendar blocks

Once a week, review your task list and block time for the items that must happen. Not every item needs a block — only the ones that require focused work or have a deadline. Meetings take care of themselves; deep tasks need explicit blocks.

Daily: use the list within the block

Within a work block, use the task list as your queue. You have a 90-minute window for project work — the list tells you what to work on, in what order. The calendar determines when you are working; the list determines what you are working on.

End of day: sync what moved

At the end of the day, note which tasks you did not finish and whether they need a new block or can slide to the list's next review. This prevents the list from silently growing while the calendar looks clear.

Key takeaways:

To-do lists capture; calendar blocks schedule.
Use the weekly review to move list items into calendar blocks.
Within a block, let the task list determine the order of work.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

How to Schedule Deep Work Blocks That Actually Stick

Sergey Ilin — Wed, 20 May 2026 11:03:15 +0000

How to Schedule Deep Work Blocks That Actually Stick

Originally published on Schedule Calendar Blog

Deep work is the kind of thinking that produces your best output. The problem is that calendars fill with shallow commitments first, and deep work never gets scheduled until it's too late in the day to do it well.

Why deep work blocks disappear

Deep work blocks fail for predictable reasons. They get scheduled as the last thing, in the leftover gaps between meetings. They are marked as Free, so they accept new invites without resistance. And they carry generic names like 'Focus time' that offer no accountability when you sit down to start.

The result: by Wednesday, the deep work session you planned is gone — moved for a 'quick call', filled with email catch-up, or simply never started because the day got busy.

Choosing the right time for your deep work block

Most people have a natural cognitive peak — a 2–4 hour window when concentration is sharpest. For many, it's early morning before the day fragments. For others, it's late morning after a light startup routine.

Protect this window before anything else. Schedule your deep work block before opening your inbox, before checking Slack, and before accepting any new meeting invites. The block should claim the best hours on your calendar, not the remaining ones.

Useful constraint: schedule your deep work blocks on Sunday or Friday for the following week. The further in advance a block exists, the less likely it is to be displaced by something that feels urgent in the moment.

Making the block structurally resistant

Mark it as Busy

A block marked Busy does not accept meeting invites silently. Anyone who tries to schedule over it sees the conflict. This does not make the block permanent — you can still move it — but it adds friction to the wrong decisions.

Name it specifically

A block named 'Write API documentation section 3' is harder to skip than one named 'Deep work.' The specific name creates a commitment. When you sit down, you know what you're doing. When you're tempted to scroll instead, the name is a mild accountability signal.

Give it a minimum length

Blocks shorter than 60 minutes rarely produce deep output. The first 20 minutes often goes to orientation and context recovery. Protect a minimum of 90 minutes for work that requires sustained attention.

Key takeaways:

Schedule deep work before meetings claim the best hours.
Mark blocks Busy — reduce the friction of protecting them.
Use specific names: what exactly happens in this block?

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

How to Set Up Time Blocking in Google Calendar

Sergey Ilin — Wed, 20 May 2026 11:02:33 +0000

How to Set Up Time Blocking in Google Calendar

Originally published on Schedule Calendar Blog

Time blocking is the habit that separates people who plan their week from people who react to it. Google Calendar has everything you need to do it well — no additional tools required.

What time blocking means in practice

Time blocking means assigning a specific calendar slot to a specific task — not just meetings. A focus block at 9am on Tuesday is treated the same as a meeting: it shows up in your calendar, it has a visible duration, and it crowds out other things that might try to fill that space.

The key difference from a to-do list: a to-do item sits waiting to be done whenever time appears. A time block defines when the work happens. That shift from reactive to intentional is the entire value of the method.

The three types of blocks worth creating

Deep work blocks (90–120 min)

Deep work blocks are for tasks that require sustained concentration — writing, coding, analysis, design. Protect these from interruptions by marking them Busy. Choose your highest-energy window of the day.

Shallow work batches (30–45 min)

Shallow work batches group low-cognitive tasks: email, Slack catch-up, admin, form-filling. Batching them into one or two windows prevents them from fragmenting your day.

Buffer blocks (15–20 min)

Buffer blocks are transition gaps — a 15-minute window after a dense meeting or before a difficult task. They give you room to decompress, prepare, and avoid the cost of abrupt context switches.

How to set up time blocks in Google Calendar

Create a new event in Google Calendar and give it a specific task name — not just "Focus time" but "Draft Q3 report" or "Review product spec." Vague block names force you to recall context every time you see them.

Set the event color to something distinct from your meetings. Most people use blue for meetings; orange or green for work blocks makes the visual difference immediate. Enable the Busy status so the slot shows as unavailable to people who can book your calendar.

For recurring blocks, use the repeat function. A daily deep work block at 9am is more resilient than one you have to recreate each week.

Rule of thumb: block 60–70% of your available hours, not 100%. The remaining time absorbs the unexpected — a delayed meeting, an urgent request, or a task that ran longer than estimated. An over-blocked week collapses the moment anything changes.

Key takeaways:

Name every block with a specific task, not a category.
Block 60–70% of your time — leave room for the unexpected.
Mark focus blocks as Busy to prevent meeting conflicts.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

5 Time Blocking Mistakes That Kill Productivity

Sergey Ilin — Wed, 20 May 2026 11:02:29 +0000

5 Time Blocking Mistakes That Kill Productivity

Originally published on Schedule Calendar Blog

Mistake 1: Blocking 100% of your hours

The most common time blocking mistake is filling the entire calendar. Every hour gets a label. The system looks productive from the outside.

Mistake 2: Using vague block names

A block named 'Work' or 'Focus time' or 'Project' tells you nothing when you sit down to start. You still need to decide what to do, which means the block offers no real accountability.

Quick fix: any block whose name does not answer 'what exactly happens here?' is not specific enough. Rename it before the day starts. Takes 10 seconds and changes the psychology of starting.

Mistake 3: Leaving blocks as Free

A focus block set to Free accepts meeting invites without resistance. Someone looking for a gap in your calendar finds it, schedules there, and the block is gone before you notice.

Key takeaways:

Block 60–70% of your time, not 100% — leave room to absorb surprises.
Specific block names ('Draft intro for Q3') beat categories ('Work').
Mark blocks Busy so meetings don't land inside them by default.

Read the full guide on the Schedule Calendar blog — including a complete FAQ section, step-by-step examples, and how Schedule Calendar helps you put these habits into practice.

Add Schedule Calendar to Chrome — free

I made Google Calendar Extension for browser that has already reached 4,000 WAU.

Sergey Ilin — Tue, 25 Nov 2025 18:17:06 +0000

I work in IT, and like any specialist in an IT company working remotely, I have to attend daily standups, various meetings, discussions, and conferences. I used to never use GCalendar at all, but now, due to work, I have to. And very often, you forget about a meeting in the calendar, even after a notification. Tracking meetings isn’t convenient at all. And I think I’m not the only one.

So, I came up with the idea to solve this problem and created a Chrome extension for GCalendar. Initially, I made it just for myself, but after publishing it on the Chrome Web Store, I started getting suggestions from users for improvements, and I enhanced it. During development, I used Cursor, meaning I was also testing the possibility of using code generation apps to build fully functional products — and I liked the result!

Now I’m curious what you think. Maybe some of you will also find it useful? If you try it, I’d be happy to hear your feedback and suggestions — maybe some features would be helpful, or maybe some are unnecessary (or might even break something).

Also, what do you think — does this project have potential? Is it worth developing, improving, and expanding? 🤔

Here’s the link if you want to try it: https://chromewebstore.google.com/detail/google-calendar-extension/dfbpjijneaihingmldgpgcodglkoamoe?utm_source=devto