My method is by reading my textbook and trying to learn the key concepts, at the end of the chapter I do the revision questions on the textbook (you're allowed to use the textbook in these questions). At the end of those, if you feel like you got the hang of the chapter you try exam papers (try without notes/textbook). I myself am not the best at studying so you should look up other methods incase their any better than me xd
Best of luck!