AS-Level cramming techniques?

Im doing my AS-Level in about 4 days and i'm coming to the slow conclusion that I am so prepared for my first exam economics but when I look past the second I put my pen down after that paper, I can feel it is just going to be a blur of sheer fear that I literally have done no recent revision for my next exams! For GCSEs the exact same thing happened but luckily i'm a expert crammer so managed to still get good results. However I really feel as though for A levels cramming just isn't going to work as there is too much to learn in too little time. I have done revision for mocks and end of topic tests and I have been doing okay so far but I was just wondering if anyone had any tips or advice from past experience for cramming for these kinds of exams?
Ps. I am doing the new linear courses so I have to learn all of my biology syllabus for both papers so any specifically for biology will also be greatly appreciated!
Thanks

Im doing my AS-Level in about 4 days and i'm coming to the slow conclusion that I am so prepared for my first exam economics but when I look past the second I put my pen down after that paper, I can feel it is just going to be a blur of sheer fear that I literally have done no recent revision for my next exams! For GCSEs the exact same thing happened but luckily i'm a expert crammer so managed to still get good results. However I really feel as though for A levels cramming just isn't going to work as there is too much to learn in too little time. I have done revision for mocks and end of topic tests and I have been doing okay so far but I was just wondering if anyone had any tips or advice from past experience for cramming for these kinds of exams?
Ps. I am doing the new linear courses so I have to learn all of my biology syllabus for both papers so any specifically for biology will also be greatly appreciated!
Thanks

How much of biology do you know and do you also do chemistry?

I'm feeling the same. My exams are split into 3 weeks, 5 in week 1, 3 in week 2 and 1 in week 3.
Every weekend i am dedicating my time to annotating all of the specifications for that weeks exams and then the night before the exam I'm annotating 2 past papers and reading examiners reports. This is probably the quickest way to revise and it's pretty effective.