If you have questions about how the major candidates beliefs match up with your own, a non-profit group called Glassbooth has come up with a web site to make it incredibly easy to sort through all the noise. Their motto? "Glassbooth connects you to the 2008 presidential candidate that represents your beliefs the best. " Simply take a (surprisingly!) short survey on major issues and find your best match. It even shows you their votes on issues and policy statements.
And if you're not registered to vote, they can help you with that, too.
Pass this web site along to friends before their state's primary race. (They just might need it.)