Revise using a method best suited to you. Making notes and sitting down isn't an option for everyone and I understand. You can though create flashcards, posters etc and stick them on your wall and then read them at night or smth. So me, I learnt all the equations in physics and maths by sticking them up on the roof and the walls so at night, I could just read any and over time they stuck in my head. To memorise and learn content, I think the only way is to read. Now that depends on you but I use headphones and play music and then read. It's hard to start off with but you slowly get used to it.