Don’t procrastinate your studying!
As hard as it is, studying long before finals will definitely help you in the long run. Instead of waiting till the night before make a plan, begin at least a week before finals even start. Setting at least one night (depending on how much review you need) towards focusing on one class instead of all every night can help you remember the information you need to instead of trying to cram it all in one or two nights.
Studying for too long can be mentally exhausting and will NOT help you remember information. Instead of going for a straight 4 hours of studying, decide to take a break, go on a walk, make a snack, watch an episode of The Office, etc. Whatever it is, diverting your brain from something other then text books and equations for even just 15 minutes will help you in the long run.
Talk to your teachers!
Chances are, even if you do amazing on the final, it won’t bring your 75 to a 90, as awesome as that would be. Instead of settling, talk to your teachers about helping you raise your grade before the final (NOT THE DAY OF). depending on the teacher, many of them will be willing to go over what you don’t understand or even let you make assignments up, but they can’t read your mind, you have to talk to them first.
Don't choose studying over sleep, because a good night's sleep will guarantee you a better score. Manage your time so that you have enough time to do both studying and sleeping. Even I know I will probably ignore this rule and stay up past usual, which is reasonable, but instead of pulling all nighters or waking up at the crack of dawn to study after spending hours the night before; plan ahead on how long you will need and start early during the day so you can be well rested.
Change your studying technique a little
Even if you know exactly what your studying technique is, you can make it more beneficial by even adding color, or candy! After every section is studied, treat yourself to a piece of candy or snack. Changing up your studying routine could be a new playlist, or even a whole new way of studying. This could refresh your brain from the same old, or make studying a tad more fun!