The night before my english lit exam since it's the only GCSE i've done yet, I watched a video on youtube and took some notes, went over my flash cards & all my other notes, nothing heavy, then I went to sleep early. In the morning I watched a show on netflix to chill out and read through this piece of paper I had made in the car (the paper I'm going to do for all my exams, basically highlights key points to remember during the exam which saves me going through the whole revision guide and maybe latching my brain onto ideas that would make me forget other things etc) and that was all haha
edit: I didn't make the piece of paper in the car, I did it like a week before, I mean in the car I went over it lol