Memorizing generalized procedures math, chemistry, physics

I am an undergrad student studying biochemistry working to refine a system that I can use for my subjects. The courses listed in the title are all very problem heavy, but I was wondering if anyone has had success in creating flashcards that allow you to memorize a generalized problem-solving framework for certain concepts. My idea is to learn the concept, then turn it into a Feynman-style flashcard for memory retention. I am aware that for some of these courses it should be up to 80% practice questions and as low as 20% flashcards/memorization and there are certain things like formulas that require pure memorization.

I'd be happy to receive any advice or criticism from those more experienced than me. I have also heard of people including pattern recognition cards and missed questions decks which I am also curious about. Lastly, I have read that in certain advanced subjects memorizing a generalized framework does not work, and if anyone has experienced this it would be helpful to learn about it.