[billswift]

You might try classical - Mozart and Vivaldi concertos have worked well for me. Also some techno has no words, try the TranceGlobalNation cds, the first one was the best. I like these in particular because the music is upbeat, which seems to help me keep going. Note that when you really concentrate, even without words music can be distracting; sometimes a fan, or fan-forced heater in winter, is just the thing for white noise to help close out the world.