How do I revise for A level History before my exams?

I do WJEC not AQA so I'm unsure of the layout of your exam and the content. Do you do sources/interpretations/essay questions? Do you do Henry, Edward, Mary, Elizabeth? What's the vibe?
General advice, you could condense your revision notes to make them smaller, doing this through reading them through once or twice and then putting them away and then writing everything you remember down, active recall, might be helpful. Plan the question out, I'm not sure what type of question you do so I can't give any further advice on this, but what I did and do is the reinforcement of knowledge through practice, literally just attempting as many past papers as possible in the hopes that the knowledge will stick.
I'm quite fortunate doing WJEC Tudors as it means that we do one source question and one essay question, and the essay question is always challenges to Mary/Elizabeth or Henry/Edward, depending if you are Yr12 or Yr13, thus it is easy to make an essay plan before hand, remember it and then restructure it to whatever the question is asking like 'the arrival of Mary Queen of Scots' or 'the Puritan challenge' etc.
Hope this somewhat helps! If you respond with the type of question you do and also what monarchs you do then hopefully I can help a little more! Goodluck