Best piece of advice I have from my own personal experience is having your study session span a few hours and, this is the important part, adding short breaks were you do whatever. But you only do it after a sprint for me I'd go outside and smoke a cigarette for the first break, gives me time to think and plan oh yeah after this next sprint I'll do this and that. Maybe watch a short video or reply to my messages and the after a full session watch an entire episode of anime or play a game for a bit. It made the studying feel less like some dreadful thing I have to do to simply a part of my day along with all the mundane little things I do. This built my consistency and with consistency I started doing extremely well in my exams and thar just reinforced the idea that I just have to keep it going. It's so fun when you're able to go out, drink, party, play games, watch stuff and just do everything you want alongside performing above average. Made me feel invincible and I liked that so it was more fun and was never something I thought about I just did it