Bonnie to Clyde, Hot Dogs to Baseball, Grease to Mechanic etc... You get the picture.
Often times I find I can concentrate more on my writing when I have some form of static noise or music. I'd prefer music, but if it's not available, at least a good fan will do. When I do have music available though, I'll listen to whatever style suits the scene I'm working on. If it's action, I'll try to throw on some high energy techno, or rock, while if it's simply dialogue or filler text, I may listen to something a bit more mellow. In times,of writing emotional moments or apex dialogue, I try to listen to my cousin William Joseph's music. He has two CD's called Within and Beyond. He was signed with Time Warner a few years ago as a hot shot piano player. (I never liked the word pianist) lol.
Anyway, his contemporary approach to piano mixed with just enough orchestra really makes for great background music. I'm proud to say, he's my cousin and I taught him everything he knows... Well not everything, but most of everything... Ok fine, not all that much, but he's taught me a few things on the piano and I'm a much more refined pianist(ugh) for it.
If you get a chance, hop on Pandora Online Radio or YouTube and check him out. He's Incredible. Maybe his music can inspire some of your writing.
Or for those of you who are incredibly lazy, like myself at times, here's a clip.