I use the Pomodoro at the end of a semester to study for longer periods without burning out. That way of studying works better than anything else for me. Breaks are short enough that your mind doesn't wander too far and often enough, to not feel like a break is still 4 hours away. The benefit of this is that it turns the whole process into a habit. It's not about today or tomorrow, but rather about the 2-3 weeks that…
I do around 4 to 5 sessions per day which hits the sweet spot for me as I can endure this for multiple months without having to take days off. This comes at the expense of having to start a few weeks earlier to have enough time to prepare for tests compared to cramming 12 hour days the week before