Nate Silver, creator of FiveThirtyEight, writes in Newsweek things to watch for on election night:
6 PM EST. Polls close in portions of Indiana and Kentucky.
Traditionally, these are the first states to get called by the networks, spotting the Republicans a quick 19 points in the Electoral College. This year, however, is liable to be a little bit different. Indiana is far more competitive than usual, and is probably the state with the greatest disparity in ground games: the Obama campaign has 42 field offices open there, whereas McCain neglected the state entirely until recently.