I thought I'd bring out an oldie but goodie topic---writing to a soundtrack. Do you do it? I do. At least, I usually create a playlist for my computer and a compilation CD to play in my car when I'm working on a book. I try to pick music that captures the mood and theme of my story, or reminds me in some way of my characters. I don't always write to the music, but I like to surround myself with it to keep me in the mood for writing.
My current WIP has a couple of emotionally-wounded characters and so a lot of the songs on my playlist are melancholy. I've written other books where I went for a creepier vibe or a more romantic vibe. The playlist for my August 2007 release, FORBIDDEN TEMPTATION, featured a lot of songs about alienation, because both my heroine and my hero were alienated in some way from their family and friends.
What's on your book's soundtrack?