I'm AQA and I do the same courses as you! If you've done your coursework then that's great, if not then prioritize that. I personally use a lot of Seneca, but I find its a bit shallow on some of the Tudors content. David Starkey has some good documentaries on you tube, as a historian he's good but not as a person. Seneca, flashcards, maybe go back through your notes and try condense them as much as you can. I'm also a mind maps fan. Have a go at planning essays as well (you don''t even need to write them.) Those are just some things that work for me