Those look really interesting. My old work mates had a set of cards that had design principles and concepts on them, and they were great for when we got stuck or were trying to come up with ideas. They were more psychology based, so they had things like Gestalt principles, and social psychology. So for instance collections - people like to collect and have the whole set of things, people group things that look similar together etc.
Unfortunately the set they have was a limited print run, and they don't sell them anymore :(.