What are you listening to?

When writing, I notice that certain music helps the words flow more smoothly from my head. Rarely its soundtrack movies, but most of the time it's not even music I'm listening to. The most helpful track on my MP3 player or computer is the sound of thunder and rain. It's so relaxing, and if I get a good candle burning (I adore First Rain from Pier1), then I can slip right into the setting of my novel. Sometimes I crank the AC up real high to give myself a chill. It probably sounds a bit crazy but I think it's a thousand times more engaging writing when you're surrounded by the setting than when you're just sitting on your bed, typing on your laptop. I'm not exactly sure if reading with the soundtrack is as engaging or harmful. What do you do, if anything, to create atmosphere when you're reading/writing?