Even More Convention Advice

First, a couple of additions to yesterday's "how to be a good con guest" post:

Rule #9: Don't introduce yourself or start off talking on a panel by saying that you don't know why you're on that panel.
If you don't know why you're on a panel, the time to ask is as soon as you get your schedule from the convention (usually at least a couple of weeks in advance), and the person to ask is the person who's in charge of programming. You never know, there could be a method to their madness. They may wan