My get-pushed partner challenged me to try some settings on my camera that I rarely use. I was reminded of the P mode that chooses a combination of aperture and shutter speed appropriate for the amount of light. It's hardly obvious from the result that I was using that mode.
At the same time, I challenged her to take a favorite object on a tour and include it in every shot. I'm trying that for myself, giving my duckie a tour of the house.
A great way to add challenge to your challenge!