Looking for some good ambient music to chill out to? I discovered the dub beautiful collective on iTunes, and I have been listening to it every night when I stay up past 3am writing. Sometimes words are too distracting when you are trying to get your thoughts down.
You should also check out OEM Radio for "ambient, IDM, downtempo, breakbeat, dub, glitch, minimal techno, psychedelic chill, and many other not-so-easily categorized sounds". You can listen to it from their site, or via Shoutcast™