I'm not a big fan of subscription services, but I make an exception for Spotify. It is worth every penny. I work in an open office and there is a lot of visual and auditory distraction. When I put on headphones, I find it easier to concentrate and the day also goes by quicker too.
My coworkers are also less likely to bother me and take me out of the "flow".
My coworkers are also less likely to bother me and take me out of the "flow".