I'm in the mood for some synthie music.
Something fast and rhythmic: Peter Baumann - Chasing The Dream (1979)
Something atmospheric and relaxing: Tangerine Dream - Mysterious Semblance At The Strand Of Nightmares (1974):
I know this isn't for everyone, I have some strange tastes in music.
I find Tangerine Dream very relaxing, it's the kind of thing I can listen to while programming without loosing focus.