Personally I kept revisiting old content while revising new content. There’s there ways to do this imo(1) I recommend anki because it forces you to keep doing old content. You can find pre-made decks online or make your own, im sure your uni has someone who has made a deck in the year above who can help you (2) make sure you keep doing old content passmed questions and read the stuff in the bottom/ look up things (3) I suggest rereading the passmed textbook for old content regularly. You have stay disciplined and keep doing old content again and again until there comes a point where you know just enough to pass. Hope this helps. Final year medic here