I like to listen to very chill relaxing music aka "chillstep", it puts me in the zone. I also listen to podcasts a lot while grinding. I find that watching a TV show takes away too much of my concentration from the game, but having a podcast on in the background keeps me entertained while still being able to focus on multiple decisions at once. Sometimes if I am faced with a really tough decision and need to go into the tank to think about it very hard I will click pause on the music or podcast. So I guess it is a slight distraction, but it makes grinding for hours much more enjoyable.