I recommended it before, but I maintain a playlist that focuses on very quiet, soothing ambient, moody soundscapes and slightly experimental music that, in my opinion, works as well for sleeping as it does for being productive and focused:
Alternatively and if you prefer a more eclectic, diversive selection that covers a wide range of moods and genres, but should still serve as a soundtrack to a relaxing sunday out in the sun or on the couch, there's this little mix series I work on - I think these particular episodes might be a good starting point:
That's always been the type of music I've put on while I work, but a week or two ago I shuffled the entire Judas Priest catalog on Google Music. I've never been a fan of Judas Priest, I don't particularly like to listen to their music, but it's been great for me to work to. Ambient noises and quiet conversations are masked, the tempo is fast, and the dynamic range isn't huge.