music

Music is probably one of the best inventions ever.  It helps people express feelings. You can use it for writing.  It sets the mood of countless movies.
Most of all, if it's composed by Hans Zimmer, it's probably epic and suitable for all occasions.
Well, most occasions.  You probably wouldn't play the Dark Knight soundtrack at your high school prom.  The Prom Queen would probably hate it, and the King would like it, and the whole committee would cave under the pressure of the Prissy In Charge.
Also, I don't know how many DJ's (or live bands, for that matter) have the entire Dark Knight soundtrack on hand.
Anyhow, music can be, as I said before, a very good thing for your writing.  Especially movie scores.  They're instrumentals (if you're like me, that's a good thing, because if a song has lyrics, I'll probably wind up focusing on their words rather than mine, which is rather counterproductive), and they're very scenic, meaning they help set the scene really well - that's part of the point they were composed, except for a movie and not your novel.  Except you can use it for your novel anyway, because you're not going to be quoting it so it's only for helping you come up with something to put on the page.
So. Food for thought. :)