TL;DR Everyone brings a piece of the online meeting environment with them. So: Be heard. Make sure your microphone is adequate, and picking you up clearly. Don't mute unless you have to. Be seen. Use a decent camera, with good lighting, and have it on by default unless there is a reason not to. Turn off self view. Be aware of your square. Watch your background, and learn how to stay in shot. D on't be afraid to check your setup with a colleague, and get feedback.