I've been listening to Thunder Grunt/ Writers/Blockbusters for a while now, and it really has given me a lot. Not only is this a good, fun, and funny way to fill time that you have, there's a ton of film knowledge with these folks. College level learning without the price tag.

If you want to be a screenwriter, you have to listen to the guys on Writers/Blockbusters. They give excellent insider analysis of films and help explain why good stories work and bad stories fail.