There are two tools I've been using a lot recently for concentration. Spotify's Pink Noise playlist and our very own Focus Portal featured playlist.
Those two options are pretty different from Ritalin. They're a lot more sustainable. Which is noteworthy considering Systematic Records have just released a compilation celebrating their fifteen year anniversary.
Jimpster's "Pipe Dream" falls beautifully between something we'd post on Indie Shuffle and what might play at a Berlin club. Not many things are able to walk that line!