A few months ago I started doing one simple thing:
every time I solved a problem, I wrote down how I solved it and why.
At first it felt unnecessary. But after a few weeks I noticed something interesting — when a similar problem appeared again, I already had a small knowledge base.
Now I keep short notes about:
bugs I fixed
tools I discovered
small optimization tricks
It takes 2–3 minutes, but it saves hours later.
Curious — do you keep personal dev notes or a knowledge base?
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