I say you take half of whatever money you have and donate it to charity. Then take the other half and do whatever you want to: make it rain, get a massage, go sky diving, get an xbox, etc.....
I'd pay off of last nights dinner with the wife with half, then I'd roll a blunt with the rest. S'ow I roll.
I would buy an limited edition dvd set of the cult classic Jumanji. Starring the lovable Robin Williams.
If you don't know what you want, spending it will just leave you with a hollow feeling. Keep saving. If you just have to "buy" something, buy some stocks.....but study up first.
Thanks for the responses everyone. I think I will end up saving mostly, as many have suggested. I like the suggestion that if I need to ask, I shouldn't be spending - don't need to be yet another pointless conspicuous consumer. I did buy $300 Bose speakers that hook up wirelessly with my iPad though.