Make a very detailed list of all the topics and subtopics you need to cover, divide the list up into the days you have to studying making sure to include a mix of subjects in each day so it's easier to keep your attention then each day at the start of the day plan out when you are doing which topic depending how your brain works you can schedule one or two long breaks in the day or many short breaks. It's also helpful to ask classmates for any good resources they use for revision as the best way to study efficiently when you don't have much time is super good resources. Good luck!
