I know it's a mundane thing to say, but I will anyway. Please go vote. It's our civic duty.
After you vote, you'll be watching the bloviating cable news pundits like me. Here are two useful guides I've seen to when the polls close on various key races, which will help you know when to put the TV on mute:
-John Fund of the Wall Street Journal
-Dan Aibel of the blog Contrapositive
And for what little it's worth, I guessed that Democrats will pick up five seats in the Senate and 27 seats in the House in my Midterm Madness entry on washingtonpost.com.