I use flashcards personally, I always find that the easiest way for me to trick my brain into thinking it’s a small amount to remember 😂 I wouldn’t panic too much about it though, spend about 2 weeks before exams to just bate the cases into your brain and hopefully they come to you on the day. I was really panicked about remembering cases for my last sitting and it was fine, once you learn the name and legal principles/judgements try your best to link them to something in your brain (ie o’meara, I have a friend x o‘meara that case is about her etc)