I often see people come unprepared in one small way or another to the Zoom / Google Meet job interviews, and that could stand in a way between them and the job opportunity of their desires. So perhaps a checklist could be of help here. Here's mine, in the order of priority:
1] visit a loo
Pretty self-descriptive action point. Take your medicine preemptively if you're not in a good health.
2] soundcheck your equipment: mic, headphones, webcam
Open the application for the upcoming call (Zoom / Google Meet / Skype / ..) and thoroughly check if your hardware is working correctly there. After that check, don't even breathe on your setup: no cable replugging, no operational system reboots, no nothing.
This action point is important enough to even ask for a reschedule if you're discovered technical issues. Don't be afraid to do that.
3] prepare a bottle of (still) water or a glass of tea
Preferably avoid anything that looks like beer or wine (kvass, vine juice) or has unobvious packaging. Don't drink alcohol (even if you're tempted to use it as a stress relief tool w/o consequences since you're remote) as you'll definitely need a clear head and a distinctive speech! Sparkling soda is suboptimal due to possible burping.
If you take some medication on a regular basis (cough medicine, antacids, ..), check your stash to be promptly available to you.
4] find a notepad and a pencil
Taking notes on a keyboard (especially on a mechanical one, but on a regular one as well) annoys most of the people: they assume you're not listening / you're distracting them. Pencil notes on the other hand are the whole different thing: they're nice and handy and you'd be able to do so much more with the paper (for instance, sketch during a brain teaser).
5] remove cats and people from the room
If what you have is only one room, try to warn the people to be quiet for a while and ask them for a favor of watching the pets. (Make some lasagna afterwards as a gratitude!)
6] have all necessary information and tools ready on your pc
Open & pin cv and a job opening description ready in the browser. Get your checklist of questions to the firm / project ready. If we're talking a programming interview, keep a console with repl ready.
7] notify the interviewer that you're ready
Join the meeting and throw a brief email / text to the person you've spoken to. Generally that's not a requirement, but it's always nice to be as transparent and proactive as possible — as Harvey Specter said, first impressions last.