rationalskepticism.org

Personally I think philosophy is overrated. I've learned more about the world and humanity by reading history than I ever have reading philosophy. Don't get me wrong, I do find it interesting but only in the same way as I find puzzles interesting.

Anyway, here is a good place to start. The supplementary materiel is on the Oxford website.

http://www.youtube.com/watch?v=hdCBGWcd4qw