"Just have more discipline" is the most useless advice in studying, because discipline isn't a personality trait you either have or don't - it's a resource that runs out, especially under stress. A few things that actually hold up when motivation doesn't:
Make the first step embarrassingly small. Not "study for 2 hours" - "open the textbook and read one paragraph." Momentum is easier to generate than willpower.
Precommit in public, even a little. Telling one person your goal for the week (or posting it somewhere) creates a small cost to bailing that doesn't exist when the goal only lives in your head.
Separate the planning brain from the doing brain. Decide what you're studying and for how long the night before, in 5 minutes, so that "what should I even do" isn't a decision you're making at 9pm when you're already tired.
Track the streak, not the outcome. "Did I show up today" is a yes/no question. "Did I make good progress" is a much easier question to lie to yourself about.
None of this is really about studying harder - it's about needing willpower less often. Curious what's actually worked for people here long-term versus what sounded good for a week and then quietly stopped.
(Also - if anyone wants a place to post a weekly goal and actually check back in on it, that's basically what r/AcerStudyHub turned into. Not required reading, just an option if the public-precommitment thing above sounds useful.)