I know most are saying blow it on this, blow it on that, but if you used it *wisely*, I would:
-Take your parents out for a nice dinner
-Take a couple grand and have fun with it. New mods, get some beer, whatever. Just reward yourself with something, but dont spend all of it.
-INVEST the rest WISELY!! Sure, nobody can say when they will die, but in all reality that is an excuse for spending everything you have. The more money you have to play with, the more it will return in dividends, and when we are talking somewhere in the neighborhood of 10k, thats a nice chunk of change. There are so many ways to take that 10k and turn it into another 20k within a year, but its up to you.