Seriously. Not to sound like a broken record, but you need to make sure you’re registered to vote! You also need to know that there are some things that may preclude you from voting - like a recent change of address - and there are apparently some folks who are actually trying to prohibit people from voting.
This is important. Take the time to make sure you’re registered!
Update: Inspired by Heather to add this link which brings the claim in the aforementioned link into question. Of course, now it’s clear as mud! 
September 30, 2008 @ 1:57 am
Most states have provisions for changed addresses. Actually we don’t even show our address except for the first time here. We recite our address out loud and they check our name off. I have voted in VA with a different address on my license (we moved and I lost the change of address thingy the DMV sent) than what I was registered with and they didn’t bat an eyelash. The link is a bit one-sided though. They seem to indicate that only republicans are misleading. I’ve already gotten a couple misleading thing (directly related to when to vote and absentee ballots) from the democratic committee here. I find it rather humorous that her post about people being misleading is misleading in itself because it is one-sided. In the end, though, we all should automatically trash anything sent by a specific campaign or party and just be sure we are registered to vote based on where we currently live.