Ask HN: A free semester before college, what do I do?

I enter college Jan '11 as a Computer Science major and Communications minor. I know the basics of each (3 or so years experience in programming and 5 years of speaking/writing/etc).

HN, what do you recommend I do for 3 months? I could start a business, learn to speak French, or take a trip to Kalamazoo, your call.

I want advice from people who were in my situation, or wish they could have been in my situation.

Thanks!