Can you imagine a life without music? Me either. For me, music plays a key part in pretty much any activity I'm doing. Below is my personal Spotify playlist which I listen to when I'm designing. It's called "The Anthology" and is an eclectic mix of songs. It doesn't follow a particular mood/tone and I would recommend listening to it on shuffle. I think I produce the best work when I listen to The Anthology — perhaps it can help you do the same.