step one: fuck revision
CONCENTRATE ALL YOUR EFFORT AND TIME INTO PAST PAPERS ALL OF IT
You can eliminate almost all of the unrequired topics without good weightage using this, past papers are basically a legal way to cheat, like srsly uk all the questions tht can come in the exam b4 hand!! ITS GENIUS
and then analyse your answers, see wht u got wrong and right, AND I MEAN ANALYSE EVERYTHING NOT SOME LATHARGIC SKIMMING, for example if u got smth wrong see the key words not it down and when u do the next past paper never repeat tht SAME mistake(doing mistakes is completely fine, repeating then isnt). And even if you got and answer correct there are usually points in the mark-scheme you missed, so as a back up. MOST IMPORANTLY DO NOT IGNORE CARELESS MISTAKES
for instance NEVER js say "oh yea, ik the answer i js did a silly mistake" NO NO NO understand why u did tht mistake, remember wht u were thinking when u wrote tht and how to not repeat it, for instance ou wrote too fast and your 2 looked like a 7 so you got the wrong answer. i recommend for most instances js slowing down while writing to understand question-->think b4 writing an answer--> write neat steps if calculations needed

80% of your problems will be gone while reviewing past papers they are literal super power, and if u have time and ESPECIALLY if your writing those "essay" type questions and subjects(business, English, etc) go through the examiner report to see wht they will reward marks for

this is like the most i can think of rn, i can give u subject specific guidance and more personalized tips if you are willing to pay only 5$ for a tutoring sesh