http://www.knittinghelp.com/

Tons of videos. I love it.

I'm no pro, but I get by. And I've never taken a class. My mom did show me the very basics when I first started, though, but anything new I've taught myself--mostly from the above website.

I also have the Stitch and B!tch books, but I haven't found them super helpful to learn from. I do use them for quick reminders of how to do stuff, though, and there are some super fun project patterns in there. Granted, I haven't actually MADE any of them, but I have been inspired by some.