SAVE YOUR MONEY!
I mean, don't be the type of person that has little to show for his money, because it's all in the bank... Save it until you really need it, or find something you really want.
Don't just look for things to spend money on. You're in for a rude awakening next year... College. It depends on where you end up going, but do you have any idea how expensive college is? You're going to need that money. Never LOOK for things to spend money on, those are never wise purchases.
Here's a good option: Invest! Bank interest stinks, go see a financial advisor, and see what better things you could be doing with that $13,000.
That's my 2 cents.