You said you go to an Ivy, right? That suggests that your high school studying habits weren't abysmal. Remember what you did then? Expand on it to adapt to your new environment. Learning is most effective when you're building off of previous work -- a learning scaffold if youhelp will.
How do you study now? How much time per week? Per class? Before an exam? What are your methods for studying (do you go to class regularly? do you read the chapters ahead of time or after lecture? do you take notes in lecture? do you take notes from the text outside of lecture? do you utilize flashcards/Anki/etc.? how many practice problems do you do? do you go see the TA/professor during office hours when you're struggling? do you study in a group? individually?)? The answers to these questions will
us to analyze where improvements can be made in your studying habits?
Also, this repetitive post reminded me of this song:
Edit: word choice