A friend has advertised 1-866-OUR-VOTE is you have any problems at your polling place, or finding your polling place, or what have you.
Voting: A civic duty, unless you're planning to vote Republican in national races, in which case it's a statistically insignificant waste of your time. (Although I suppose voting for Lincoln Chafee is forgivable, but I'd advise against it.)
I'm headed off work early to be a partisan. Feel free to call me if you're a Montgomery Country, Maryland voter and need any details on ballot questions or such.