Original post by celloelEdexcel. If I'm being completely honest, I was physically unable to revise last year due to being too sick, and prioritised other subjects when I had the ability to do so.
Advice for you (what I would have done):
I had a textbook that explained topics and then had questions after each textbook. Read through the topic, do the questions, mark them. Look at every single question you got wrong and find out why you got it wrong - if you can't see why the answer is what it is, ask anyone you can, teachers, parents, friends, TSR. Then, redo the questions separately. You should be getting near full marks.
Look at the specification and make sure you're going through each topic and revising each one, to ensure you're learning everything you need to. Once you have done all of this, start doing past papers. Do as MANY past papers as you can get your hands on. Complete them, mark them, go through the answers. Again, any that you got wrong, find out WHY you got it wrong and keep going over it until you can do the question and know how to do it.
Collect all of the questions you got wrong/didnt get full marks, then do them again. And again. And again. Until it is ingrained in your head how to do it, and you know exactly how to answer the problems. Go through as many past papers as you can, because questions are generally become the same after so many years.