Best way to revise for A-Levels

I do three A Levels, History, Geography and Geology and History and Geography have a lot of figures that I need to remember and so far I have written out flash cards that help me revise but I struggle to remember all the information on them. Has anyone got any tips on how to help me remember this information?

Flash cards are good for getting down the info but it's much more useful to discuss imo. Find a classmate who's willing to sit with you in a study period and literally just discuss your case studies or your history topics. Also get people to quiz you on important dates and figures and stats I've always found that talking and explaining things to other people is much more effective than staring at a book or some flashcards
Saying that though mind maps are my go to resource for history but even then it's the act of writing and rewriting them out that helps me remember them; flashcards will probably be effective as well so long as you rewrite out the information multiple times

And most importantly if there's loads and loads of statistics or figures focus on the absolutely essential ones if you can generalise a date (e.g. So and so was appointed in the early 1620s) then do that

Hope that's of some use!