i find it helps to make mind maps on A3 paper. i usually fill my whole wall with them. starting with topics, then important data and theories in bold. i put the, up on my wall and around the house. in the bathroom, on doors. so that a brief glance jogs my mind.

after that i usually go over past papers and look for reocuring questions and so on.

but mainly i try to structure my days into 45 sessions and then 15 min breaks.

snack often and try to eat lots of fish, fruit, nuts and dried fruits. these all help.

staying slightly cold can help as i personally find that it keeps me more awake.

it is really important though to have a cut of time maybe 8 9 pm so you have enough downtime to relax and chill. this allows your brain to process the information, but also for you to sleep as otherwise youll just become more purpetually tired.

i find that i function better when i dont smoke. so when cramming i only tok on friday and sat night and nothing the week before the exams.

hope this helps and good luck.

peace