How do you force your brain to absorb more revision or practice more per day leading up to the final? I'm finding it hard to stick to my plan since my brain just gets burned out and I can't study anymore

I had a week leading up to the final and planned on watching a certain amount of lectures and practicing come questions per day, but I just get so tired that I can never do the amount I need to for the day (this is inspite of controlling my procrastination and making sure I stay focused)