"The Sims 3 Pets" soundtrack. No joke. I've never played The Sims 3, but like the soundtrack because it is like [good] elevator music. Kind of reminds me of the SimCity 2000 soundtrack, just happy but with that undertone of momentum.

Game and movie soundtracks are great for work. Particularly when they are just scores or choirs (as opposed to bands, duets, or single vocalists). Way less distracting.