To start, perhaps take yourself over to Wikipedia, go to the page for something you like. Then, click one of the links, anything, best to go with something that you don't know much about, and read that page. Then click another link. And another. I've lost hours doing this and I've learned a lot.
Is it just me, or do other people do this too? Now I come to think of it, it seems a little odd...
Anyone ever get a little depressed after finishing a script? Not the "I'm gonna jump off of a building" depressed, but more like "holy shit, I'm never gonna have another idea" depressed.