I'm also a big fan of SomaFM for background music, although which stream I go for varies depending on my mood. I've found Cliqhop better when feeling tired, and

I'm also a big fan of SomaFM for background music, although which stream I go for varies depending on my mood. I've found Cliqhop better when feeling tired, and Beat Blender more suitable when feeling fidgety. Another favourite of mine is [http://kohina.com/ http://kohina.com/] -- I definitely find old-school game music helps me focus. Perhaps it's conditioning from the hours on end spent sat in front of an Atari ST in my youth...