In spite of the title, this is completely unrelated to Harry Potter. It's just one of the playlists I listen to at work when I am staring down 60,000-line spreadsheets. Includes a variety of genres and moods, but all instrumental.

Image from SilverGryphon8 on DeviantArt (http://silvergryphon8.deviantart.com/art/Brain-In-Blue-167071714), used under a Creative Commons Attribution-Share Alike 3.0 License.

11 tracks