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Most Americans will cast their ballots for the next president tomorrow. But how you vote and what you're allowed to do, say and even wear at the polls varies by state. In order to make sure your vote counts, it's critical that you know the rules. Following, a smattering of the most common voting rules -- along with some of the strangest.

Keep Your ID On-Hand All first-time voters are required to present valid identification such as a driver's license when they vote, but some states have additional caveats. ID laws in Indiana and Georgia are the strictest, requiring all voters to show ID or get a provisional ballot (more on that later). In Michigan, first-time voters who registered by mail have to show up in person to vote -- no absentee ballots. To find out the ID requirements for your state, click here.

Watch What You Wear "Electioneering" laws prevents you from wearing a Barack Obama T-shirt or a McCain button to the polls if you live in Illinois, Missouri, Tennessee, Virginia or Pennsylvania. Rules vary on how far you have to get from the polls before you can wear, say or do something in favor of a candidate. In Illinois, it's 100 feet away (so be sure you park far off if you've got a bumper sticker!); in Missouri it's 25 feet from the polls.

Click here to read more voting rules.

A New Voter? You May Have to Vote by Provisional Ballot Thanks to the record numbers of people registering to vote for the first time, some last-minute names aren't showing up on polling place rolls and new voters are being required to vote by provisional ballots. Provisional ballots are used when there's a question about a voter's eligibility (for example, if a voter is at the wrong polling place). To find out where your polling place is located, click here.

Have a Problem at the Polls? Complain Complain Complain If you're given a hard time at the polls, told you aren't allowed to vote or told you must go to a different polling place (and you're sure you're at the correct location), alert the chief judge at your polling place. You can also contact the election watchdog group Election Protection at 866-OUR-VOTE.

Some Other Unique Voting Rules: In Washington and Oregon, voting is done by mail, except for in Washington's King County, which includes Seattle. And in North Carolina, you can vote at the mall.

· When it comes to how you vote, voting a straight-party ballot is okay in places like Texas, but not in North Carolina.

· Those creepy people eyeballing you before you pull the lever? They're poll watchers, and they're put out by the political parties to make sure you don't do anything shady. They are allowed to challenge your vote if you make them suspicious.

· Want to take part in the Video Your Vote project? Don't do it in Michigan, where it's illegal to use recording devices in the polls.

· And forget about rushing around to cast your vote on your lunch break. Many states such as Texas give workers two or three paid hours off to go to the polls. Click here to see your state's laws.

More on election day: If you're looking for company while you watch the votes roll in, try Digital City's list of election parties all over the country.

Now that you're ready to vote tomorrow, check out these hottie guy politicians: