Finding the revision techniques that work best for you (they can vary between subjects!) is a bit of trial and error really - I found websites like seneca learning, and youtube channels like freesciencelessons and Mr Salles useful.
I think making sure you understand the content is the main thing, not just memorising it
There's no specific method to use, you just have to find what suits you since some methods of revising might not help you. feel free to private message me if you want any suggestions or revision tips. I'm more than happy to help. I'm the same age as you.