Are you registered to vote?
If not, time is running out. Here in Michigan, in order to vote in the November 4th election, you must be registered by this coming Monday, October 6th. Michiganders who would like to see if they're registered should visit https://services2.sos.state.mi.us/mivote/
Other states have other deadlines. I ran across a rundown of the various deadlines at a site called Declare Yourself (which I don't know much about -- it appears to be a service of MTV); so if you're not registered, check your deadline and then please register ASAP.
It's easy to take democracy for granted, but it happens one vote at a time. Your vote matters. Be sure to cast it.