[jcfrei]

I've realized that it doesn't matter so much what I listen to but rather how much. The more often I hear a song / album whilst working the better it helps me to focus. For a while now this has been pink floyds pulse concert from 1994.

[georgemcbay]

For me, songs without lyrics work best, doesn't matter if it is classical or instrumental techno like Nine Inch Nail's "Ghosts". Songs with vocals that I've heard a lot are better than songs with vocals that I've never heard before, presumably because my brain isn't trying as hard to process the words as it would be if I hadn't heard them as much... but songs with no vocals at all are the best for focus, IME.