http://www.organic-chemistry.org - The organic chemistry portal. This website offers a detailed analysis of most common reactions. A lot of it may be over your head, but there is some good stuff there.
http://en.wikipedia.org/wiki/Organic_chemistry - This is a great place to start. Wikipedia gives you the basics and by following the right links you can pretty much answer any questions about organic chemistry.
http://en.wikipedia.org/wiki/Arrow_pushing - This idea of arrow pushing is what finally helped me make sense of organic chemistry. I highly recommend studying up on this method.
http://videolectures.net/Top/Chemistry/ - Search this database of videos. These are real lectures that cover specific topics. If you find a video that covers a topic that is stumping you, then you are golden. Not too much of a selection but they are good.