I was in a remote meeting and failed to realise my laptop's camera was broadcasting. A roomful of people saw me, clad in horrid workout clothes, jam my finger up my itchy nose and scratch my balls.
And make sure your phone is muted. The first conference call is easy. When you have one every day for a year and it becomes so common place... sometimes you forget. I've heard some people on my team coughing obnoxiously, yell at people driving, doing the dishes, etc. Mute your shit, and tell your team mates immediately when they aren't muted.
Key takeaway: always check the cam.