If you haven't brushed up on the issues, take some time to do so. Write down the way you want to vote on an index card, take it in with you and do your civic duty!
If you don't vote, you don't get to complain when things don't go your way politically. And don't try to tell me that "politics don't matter" or that "politics don't affect me"!
Everything is political. Every act you do has political consequences whether you are aware of them or not. Everywhere you shop, everything you buy, what you do for fun, for work or just hanging around. How you keep your house, the products that you use, whether you recycle or compost or not - all of these things have political consequences.
So get out there and do the right thing for yourself, your community and your country.
Vote, damn it!