I do AQA and this is what I do: I like to take nice notes during lessons and read them over at the end of the lesson to understand everything covered, then I try to condense the whole topic, using key words and short explanations of everything on one A4 card before we have an assessment on it. I use my CGP book and revision guide for this as well as Google so I have like two quotes for each topic. To be honest, R.S. doesn't require an immense amount of revision but more of practice questions. I consistently get 8+ by following a specific structure in my exams:
Q1 - Process of elimination unless I know the answer
Q2 - Normally you can guess, but make sure your answers are sensible, e.g. 'How do Christians celebrate Easter', don't say easter eggs. Trust me, I tried LOL
Q3 - Point, explanation. Point, explanation.
Q4: Like an extension of Q3 but with quotes and quote explanation: point, explanation, quote, explain why this quote backs up your point x2.
Q5: The way I do this question is really extra and long, I normally write like 1 and a half pages. So, I skip doing an introduction, then I do one paragraph: FOR the statement, AGAINST, FOR. Then I do another paragraph, AGAINST, FOR, AGAINST. I do this so I have counter arguments and I try to use 'This argument could be seen as inconsistent/flawed because...". Also make sure to add any quotes you could relate to your points. Then at the end, weigh up everything you talked about and either be overall for and against for top marks.
Also another good thing to do is plan the answers to twelve mark questions so that if it does come up in the exam, you're prepared.