Sup gang

even tho i sometimes lack of motivation, i’d say i’m a pretty good student. Rn i have one of my first and biggest exams in front of me and i actually need to get into it. When i gave it a thought, i never really know how to start and i always end up just rewriting bunch of stuff, saying i’ll get back to it (which i most likely won’t) and then praying to somehow have it memorized.. So my question to you is, how do you effectively memorize stuff? Say, you have 400 pages to learn, devided into 30 topics. Where do you start to be ready to take a test and do great? what do you omit while preparing and what do you focus on? methods?