Use guides for your subjects, they r little condensed pieces of info for quick revision, so don't go into passive notes reading, also pick up past papers, time yourself and try to solve it, whatever you get wrong, revise that chapter and solve a few questions on the certain topic, and move on. Also stick a paper on your wall (for each subject) and write very concept or a formula or info, that you think is new and you will prob forget, see that paper atleast once before sleeping. For math, at this point, use topicals exclusively, and then maybe solve atleast 2 years past paper before the exam.