Work Awesome has a list of 7 study hacks — in other words, 7 tips/techniques/strategies to study more efficiently.
Check out the list — I agree with #2. Setting “mood music” can be effective. Flashcards can be a waste of time, though. To make flashcards super effective, use them sparingly and mindfully.
If I were you I’d ignore the caffeine hack — don’t mess with how your body naturally works. Plus you should be getting enough sleep so you don’t even have to take regular naps.
Try out a different “hack” each week, and figure out what works best for you!