I used to listen music at work. I tried instrumental songs in the morning. Heavy metal songs after evening coffee :D Sometimes it makes good progress but sometimes it makes situation worse. Switch between playlists,create playlists, find songs, skip songs.. lot of work! These days I'm using this app and I love this idea of a simplicity.
Different types of natures sounds also include man made sounds. It's worth giving a try and see if this works for you.
Noisli
ps
Post your personal favorite mix here. Mine: rainfall + train