You sound like you have the gear covered. Leave the cup at home, it'll only make it hurt worse.
The best thing you can do is talk to the other cowboys there when you draw your bull. Find out what they can tell you about him. Does he blow out? Spin? Shoot? If he spins, is it a flat spin? Does he sunfish? After you find out what he does, ask for advice on how to stay on top. Most of the boys you meet at the local arena have probably been on the local circuit a while and have seen and riden these bulls a time or two.
Also, refrain from telling the other cowboys about the other crazy things you've done or what you plan on doing. (sky diving, bungee jumping, etc.) They'll peg you as a thrill seeker and ignore you at best. At worst, they'll give you bad information and that could get you hurt. To them, rodeo isn't a sport. It's a passion, a way of life and they take it very personal and serious.
Best of luck to you and make sure someone has a camera ready. It may be a short ride, but you'll want that pic.