My latest side project will likely help with that just because I can do simple, charming grayscale graphics in an interface I basically already have figured out and some of that means I get to flex my background art skills. And it also means I get to try a new style I'm not used to working in because it's a digital pet thing and I have a rather specific image of how it should look. I only have a few sprites for now, but am very satisfied with them.