from personal expirence, I would say don't eat peanut butter before a show and also, don't drink any really cold water because it shocks your vocal chords.
Ways to annoy people:
Arrive at a meeting late, say you're sorry, but you didn't have time for lunch, and you're going to be nibbling during the meeting. Then eat raw potatoes.
Ask people what gender they are,or
Disagree strongly with everything anybody says:)