I can only help with history and drama (I got A*s). I'd say slow and steady revision. Make some flashcards on quizlet, or some physical cards whichever you prefer (which is in itself revision) and go over them once a fortnight. For history, these flashcards were individuals' names, and key terms, keep them concise. On quizlet they used to have (haven't used the app for a while) a setting where you could keep viewing flashcards until you got the answer right. Taking it slow for the off months that aren't just before mocks or the real things, but keeping a routine with studying will make the content second nature. Once you've got the basics, find a small handful of niche individuals for history to get the As/A*s (ie the people who are mentioned once in the textbook), this shows a depth of knowledge when you add them into essays. And write lots of essays. One of the hardest things is exam technique, because even if you know all the content, if you aren't communicating it succinctly, you're going to miss out on the top bands. Once you're confident in your ability to write the essays in time constraints, don't waste your time writing every essay you find, instead do some in depth plans. Analyse sources (this was the absolute bane of my existence lol), so you can get in the habit of finding the hidden information. With Drama, my teacher suggested mood boards (which I spent hours on and maybe looked at once), but I'm not a visual learner so maybe this will work for you. You want to be going into the exam with a progression in your head about the lights, set, props, costume, sound (and obviously the acting verbal and non-verbal). With your practitioner for the directoral adaptation (if you're doing this? I was edexcel), have some quotes (literally 3 words) that you can slip into your essays, makes it look like you know the practitioner inside and out (even if you don't). I'm sure you've heard this too but the live theatre review question (for edexcel) is literally the same question everytime just worded differently, usually something about theatre being pointless and not appealing to a modern audience..! Hope this helps, let me know if you have any questions and I'll see if I can answer them 🙂