At my school, we got given revision booklets which i turned some into flashcards (didnt have time to do all) which i then either just went through the flashcards repeatedly or for the booklets i didnt make flashcards for, i just read through them. while reading through these i would put emphasis on dates and names e.g. "the magna carta was signed in 1215, 1215, 1215, 1215 ,1215" in order to get it in my head which worked considering i can still remmeber that date lol . i then the week or two leading upto the exam, did past paper questions to reinforce knwoledge. i focused on the big essay questions and once i wrote them, i read through them so i had a answer prepared. also, learn the markscheme and know which questions need context, content and provenece. if u manage to memorise a essay this can come in favour as on my elizabethan england exam i got the exact question i wrote the nights leading upto the exam which meant i flew through the exam. this tactic got me a 8 in history however bare in mind everyone is different as im quite an odd case as passive revision works best for me (reading through notes) and this is very passive heavy while actually most people work best with more active revision doing questions, making notes, making posters etc.. DO NOT MAKE THE MISTAKE I MADE - REVISE EVERYTHING, i assumed some content which appeared the year before couldnt come up which on my power and the people paper 2 of the questions were on stuff i didnt revise which could of brought me up a grade if i did study it.