Oh, in terms of actually being potentially helpful, however... a couple pointers that helped me get started:
-Talk to everyone, good, bad, pretty, ugly, NPC, PC, bush, rock, etc.
-Don't think that just cuz you're new you can't be involved, help with the plot of the weekend, and be integral to the good guys winning. You can!
-Do come in with a reason to be there and make an effort to accomplish it.. it gives you something to focus on if/when you feel a little lost for direction. Wanna join a healer's guild, get training, find a home for the winter, develop contacts for your uber-spy network, whatever. Just give yourself that personal focus that will re-center you if you're not sure where to head.
-Combat tip: When in doubt, fall down. It gives you time to figure out if you're still up or not, think about how the effects you just got blasted with should be RPed or effect you, and is a nice little time-out. Ohyeah, and if you SHOULD be down, you're happily already there!
Have a great event!