FiveThirtyEight at nytimes.com has great analysis of the polls leading up to Election Day. It explains how likely a candidate is to win each major political race, using data from telephone polls conducted in the months leading up to the election.
CNN's Election Center will have up-to-date election results all night. Visit "The Basics" tab to get details about different political offices (e.g. how much money does a Congressman make? and how is it possible that the same Congressman has been representing a district in Michigan since 1954?). Visit "The Issues" tab to see what people have to say about the economy, health care, and other things that voters care about.
Vote411.org, organized by the League of Women Voters (but very useful for men and women, I promise), includes a space where you can enter your address and find out exactly who and what will be on the ballot in your neighborhood. When you get to the page where your building shows up on a map, scroll down, click the orange "Continue" button, and you'll be taken to a page that lists the candidates for every political office that's up for a vote in your area.
I'm about to leave my teacher meetings at City College and go across the street to the school where I'm registered to vote! Woo! It's voting time! Get psyched!
Update (4:08 p.m.): Ladies and gentlemen, I have, in fact, voted. That's right: I exercised my voting rights, which are protected (at least, sort of) in that good old Constitution. And I already know what you're thinking--you wish you were 18 so you could be in a photo as awesome as this one: