Early voting is ongoing in Ohio, Iowa and North Carolina (and most counties in Florida through in-person absentee ballots). It starts this Saturday in Nevada and becomes available on Monday in Colorado and in Wisconsin.
To help the GOTV effort, visit your local campaign office, participate in an event near you, or volunteer from home by making calls. You could also write a letter to the editor (and Obama's website even has a cool tool for people in IA and NH). And if you're part of the legal community, please join OFA's Victory Counsel to help protect the vote on election day.