Less-involved sports like baseball provide me some entertainment and background noise I need.
I also like popping on a movie. Usually either something I've seen before, or something that I know won't require too much attention. To me, it's a good way to catch up on some of those movies that slipped by me for a lot of years, but may not hold up all that well. I fondly remember shopping out a gorgar while watching the original Total Recall. I also watched a couple of seasons of Workaholics while shopping a STTNG.