To quickly catch up to speed on candidates in the running for the 2012 Election, check out CNN's Election Center here. The site will allow you to not only see who's running (and who's out), but also where each candidate stands on the issues. Reading over the brief snippet of each candidate will take you less than 5 minutes.
Rock the Vote, an organization I became familiar with in 2008 during the last election, is reaching out to citizens in the Millennial Generation (those born after 1980), as this generation makes up about 1/4 of the voting population- and unfortunately, is largely absent during elections. Visit their site to register to vote, ask any election-related questions, or to see how you can help get involved in encouraging others to vote. Popular bands amongst the targeted 18-29 age group are also joining in Rock the Vote's efforts by touring with them at select cities around the U.S.
If you haven't registered to vote yet, please do so! Whether you're affiliated with the Democrat, Republican, or Independent party, make the time to voice your opinion on issues you're concerned about. If you're unable to vote at your designated precinct on election days, request an absentee ballot and submit your vote in the mail. It's great that we live in a country where we're able to speak up about issues that are important to us, unlike many other countries around the world. Take advantage of the fact that we live in a free country and make moves to support the issues close to your heart.