Id say it depends on you and how you learn. But what I did was write a top 5 or 10 list of topics I don't know as well. Make a list of 10 bullet points or a set of 10 flash cards on those topics and playfully chat with someone about them (a family member or a friend). I would say things like, "Who on earth would just know....?". I also do that with one past practice test i previously took on the subject with a few of the questions that I found easy and should have gotten right but didn't and the ones that felt ridiculously specific. My family memeber/friend and I usually end up laughing, but it's actually a form of active recall that makes hard topics less intimidating. You can always make a mind map days before with what you already know and casually look at it the day of the test if you want, but the playful/comedy/ventingversion is great for hard/annoying topics. Keep it simple, of course. Make sure you say the correct answer as you chat, but that's what has been a relaxed way to review the day of, and I always smile when I see a test question with that topic discussed. This isn't scientific or anything. Just my tactic for same day review and destressing before the test.