- english lit, practice your critical analysis skills, practice deciphering possible meanings, practice evaluation skills. i used to do this by getting random passages from the play/prose/book and try to analyse it. you want to find strong powerful words, techniques, hidden messages, etc. this will make sure you can actually do your questions right. after this, comes memorising some quotes. i would find 2-3 short quotes from each theme, and 1-2 longer quotes for this theme. i practiced analysing them, and answering theme questions using these memorised quotes. you don’t need to use 100 quotes for each essay, it’s more about how well you use those quotes. your writing and sophistication, SPAG, are more important in GCSE than memorising 100 quotes. if you memorise a small amount and you’ve practised answering questions, then you can practice writing better: imbedding quotes, using sophistication etc. i got an 8 for my english lit and only remembered maybe 20 quotes max or so.
- english lang: go on a random prompt generator and practice creatively writing. you can learn techniques, etc. alternatively if you really struggle with writing creatively, write a good story and memorise it’s core. then you can use this story for every single question, but change some things to make sure it fits. i never actually did my english language gcse because of covid so can’t help more there, but just practice creative writing, whether it’s through reading other peoples work, books or actually practicing describing things in a sophisticated way.
- maths, you can really only revise well by practice questions, learning things you don’t understand, knowing what you’re doing wrong on questions you get a wrong answer in.
i know this doesn’t answer your question fully, but hope some of what i said is a bit useful nevertheless