I'm a long-time photoshop user, and I've been developing a Mac App on the side to make finding and learning shortcuts easier. It currently has about 600 shortcuts for Photoshop, and is actually really awesome now with my new update I released a few days ago. Here's a video to give you an idea of how it works: https://www.youtube.com/watch?v=azxWgaGwzrM
I have a handful of free copies I can give you guys in exchange for some feedback. Just comment below, and I'll PM you a download code. Hope you guys find it useful for stepping up your photoshop skills!
Let me know if you want a free copy!