Comment by antihero

I've always found myself to be most productive when listening to repetitive electronic music - it motivates but also doesn't distract you too much.

Check out http://www.youtube.com/watch?v=bUAAVUKk6Fc - it's rather seedy and excellent in it's own right. Two Lone Swordsmen is okay, too.

Another good one is soundtracks - personally I like futuristic stuff (Deus Ex: HR soundtrack, or Mass Effect, or Person of Interest), as they are designed not to detract from the point of focus.

Lastly, luvstep/liquid dubstep type things are quite vapid but listen-able.