U.S. Citizens:

VotersUnite! has an excellent web site that everyone needs to visit before the November election. On this site you can easily check to see if you are registered to vote, and also verify your polling location.

All you need to do is follow the directions and enter your street address. You will know instantly whether or not you are properly registered.

The reason this is so important is because the Republican Party is doing everything it can, in this election, to disenfranchise as many Democrats as possible from the polls. In most cases, voters who thought they were correctly registered (but weren't) don't find out until they go to the poles on election day and discover that they've been removed from the registration roll.

If you're a citizen who lives overseas, go here:
https://www.overseasvotefoundation.org/

If you're a student, go here:
http://www.brennancenter.org/studentvoting

Also, it is important that you let all your friends and family know about this quick and free service and urge them to check.