More specifically, sign on to youtube.com. The 'video share' site has long been appreciated for its entertainment, but it's also a great place for college students to catch up on, or get help with, subjects they're having trouble with.

More and more professors are offering 'mini lectures' online that take a student step by step through complicated processes such as writing a research paper or designing a computer program. This video on installing a Firefox extension is a nice example.

Just type in the subject you need help with at the youtube site, and there's a good chance you could bring a college professor right into your home.