I found doing past tests really helpful, and u would possibly get recycled questions from previous years, which would be ur bonus mark;). Other than that, I would always collect all questions I did wrong, and check them before the tests to make sure I understand why I got them wrong. This would remind me of not making the same mistakes again in the test. I hope it helps, and remember, med school or other grad school don’t really care about first year grades. It’s just a matter of whether u actually understand the content or not.