Personally, I like revision clocks and mind maps and I also make a lot of Flashcards for different topics. I know some people say it doesn’t help but I like to write notes because I find it’s good for me to summarise the key information and it seems a bit less overwhelming that way. I know some people don’t like that method but it works for me so I think it’s just personal preference really.
I stick mind maps and posters that I make on my walls or ceiling so I’m constantly reading them and seeing the information which I think helps a bit too, to make it stick in my mind, although some people say that doesn’t help much either so again I think it’s just based on what works for a person individually.