There are some combinations with Discover that will yield some nice returns besides the 5% categories. They have Discover deals (extra cash back) at stores like Saks, Nike, LEGO, etc. that come in handy during the holidays or gifts. You also have some good redemptions on certain GCs that can sometimes be as high as 25% off the face value of the GC. You have gas cards for Shell at 7% off face value, which is not a lot but when combined with other multipliers can turn into a decent return. It's not a daily driver, but if you can pick your spots you can get some decent earnings over the course of a year.