Make sure you get your mock papers back from your school so you can read over them and see where you want wrong- don't just skim read, look for common errors, writing mistakes, weak analysis etc. It might be worth re-doing the same mock papers and asking your teachers to remark them. I would also recommend personally asking each subject teacher if they can spare you some time to talk over what they think you need to do to improve and what they think you are already strong at it.
I dont know how you're doing your revision so far, but make sure you're doing past papers. Personally, I would recommend not diving in blind to a full paper immediately. At first, it could be a good idea to read through the questions first, revise what you know will be in it, and then take your time going through each one. Then later on in the year when you're hopefully more confident you could do past papers in timed conditions not reading them first. Most importantly - make sure your teachers mark all your answers !! If they've only given a score and not written any feedback, you absolutely need to ask them yourself to give you feedback - it's like 90% of the reason doing past papers are helpful. Also, if there's a specific type of question or specific topic you struggle with, there's lots of revision websites that will just have collections of one question/topic to use.
Then obviously there's things like mindmaps, flashcards etc, but they're very dependent on each person's learning style, and some people might not find any of them useful, you just have to figure out what works for you. Personally, me and my friends found it useful to ask each other short-answer knowledge check questions from the textbook (etc for psychology - give me one strength of X study). I also found explaining a topic outloud to my parents helpful for consolidating my understanding and helping me remember the information.
Best of luck and I hope you find what works for you !
