Try saying your notes out loud that helps me so much as I struggle to remember when I just read or write.
Also you could record them onto your phone and play them back as you fall asleep so it's the last thing you think of before you sleep which means your brain categorises it as important information.
Past papers are extremely important. I mainly revised using past papers, questions are often repeated and it shows how many actual marks you can pick up without knowing much when you know exam technique.