I was having trouble working about five days ago. My attention kept jumping all over the place. I remembered listening to cassettes of subliminal music back in the 80's, and I figured that the progress we've made in brain science since then, there might be helpful music I could listen to now. A quick search for "ADHD music" brought back only a couple of results. I listened to the samples and chose "Music to Concentrate and Focus for Adults with ADHD or ADD Symptoms" by Ingmar Hansch; an hour of music for only $1.29.
In the days since then, while listening to this album, I've been able to work for longer periods with less anxiety and fewer distractions. The music is composed of sustained harmonic riffs with interesting rhythmic beats. It strikes the perfect balance of being unobtrusive and interesting. No tacky new-age pseudo-spiritual stuff. Check it out and listen to the sample: http://amzn.to/2D2pPrG