Equipment setup

Use dedicated, wired headphones. This prevents echo.
Use a dedicated, wired microphone.
1. This doesn't need to be fancy. The one that is in your webcam is probably fine. The one in your laptop is not good.
2. Airpods suffice for some calls, but tend to be problematic for longer usage. Avoid if possible when working at home.
Make sure you face the camera. If you have a laptop to the side, use a dedicated webcam.
Set great Zoom defaults: always start muted.
Remember your lighting!

Desk setup

An ergonomics expert explains how to set up your desk in 3 minutes.