If you'd like a summary of what to watch for tonight, see this excellent hour-by-hour election guide.
Here's where we'll be updating results on 270toWin tonight:
President: As states are called, they'll appear in the table in the bottom half of the page. The electoral vote count will change, along with an updated probability of victory for Clinton and Trump and other stats. The electoral map on the top half of the page will also fill in.