Paneling
It's only recently that I've learned you can get onto panels at sf cons by checking the little box in the registration form that says "I'm interested in being on panels." Sometimes that results in the ConCom deciding whether to ask you to be on panels; sometimes it results in them sending you the programming survey and letting you indicate what panels you want to be on. The main important point that I didn't understand 'til recently is that you don't necessarily need to be Known to be on panels, and you don't have to wait for a ConCom to contact you and ask you to be on them.