Watch out who you room with. If its at all possible, get your OWN room there, but if not (like you can't afford it, etc) only room with people you know in person.
Lol I don't know how to stress this enough. I've not only had bad experiences myself, but a lot of people I know have had them, too. Its not worth it >.<
I agree bring more money than you think you need. Keep in mind you'll be going out to eat all the time which gets expensive, and its always good to be able to go
somewhere nice. Doesn't hurt to save up a bit beforehand. Its also nice to be able to go out on the town.... Cons are fun, but panels only go so far. Well, for me, at least.
Lastly, if you see a crazy bobcat at the bar... Stay away! He's nuts.