I would recommend to everyone that if, no matter how unlikely, you do wind up with a superpower or two, for fuck's sake do some research. Read comics, watch films related to your power, and learn how to use them and more importantly what NOT to do.
Say you can turn invisible. Watch Hollow Man so you can avoid being turned into crispy Bacon. So you're immortal now? Take a page from Highlander, do something to protect your neck.
Also, if several of you have powers, team-up! We could use a JLA, Fantastic 4, etc. right about now. Learn strategy, team tactics, etc. Or, if you decide to get all villainous and shit, remember not to tell the hero your plans until 35 minutes after its been carried out. Fuck death traps too - use your power to waste your adversary immediately (watch any James Bond movie or 60s Batman episode).
Remember, knowledge is power, it's one to grow on, now you know and knowing is half the power.