Research the type of learner you are i.e. visual/oral/kinaesthetic and experiment with techniques to see if they fit your style of learning. If you're a bit of both or a bit of all three, use a wide range of techniques to learn - meaning use a wide range of resources to aid your revision e.g. textbooks/revision guides/past papers/flashcards/videos/websites like quizlet/apps like gojimo etc..there's hundreds of things out there (also stuff that I used this year to help with my GCSEs)...and they are available electronically and non-electronically.