Memory palaces helped me for exams in medical school. I would incorporate the (major) Peg system (https://en.wikipedia.org/wiki/Mnemonic_peg_system) into my palaces. Put 'meteor' 'tail' 'pink' in your palace and you've memorized the first 8 numbers of pi (3.1415927).
Ok, let me see ...
meteor: 3-1-4tail: 8-5pink: 9-2-7Neat!!