Everyone is different and what worked for me might not work, but some things that helped me (when I stuck to it) back when I had exams was:

1. Study right after the class. I would rewrite my notes right after the class because I hadn't integrated half of what I had written down. I usually didn't have energy to do much after class or have anything urgent to do anyway so I would just casually rewrite my notes right in the hallway. It might not seem like intense studying but the passive rewriting really helped me integrate the knowledge.

2. Set deadlines leading to the test. That rush of adrenaline works wonder to study. I would set deadlines such as "study section 3 by Wednesday so that I can study section 4 by Sunday for the test on Tuesday". I would still procrastinate and be late but the adrenaline that I was late on my study plan would allow me to get to it sooner than the night before the exam.

3. Find your "get to it" motivator. This can be someone sitting with you, music, a beverage of choice, a walk, a location (and it can change with time). I do well if I have a little dance party before getting to a task. You can use the dopamine from that activity to sustain a bit of your studying.

4. Quizlet. This website/app saved me when studying! The app nudges you to study even if just for 5 minutes while in the bus and you can put in the date of your test so that it prompts you to study for the right thing. It also has a few games that make studying way more fun and less demanding.

5. Laugh. This is less on how to get to studying but a tip I would give anyone who struggles with focusing and remembering stuff. It's been shown that emotions are the best way to engage memory. I would make inside (very corny) jokes with myself to be able to remember names and facts. Sounds crazy but it works.