My first exam is tomorrow. I've been averaging about 9 hours revision a day, and yesterday I managed a revision high of 12 straight hours (even eating lunch whilst revising). Today I'm taking things a bit easier though as I don't want to be too tired for the exam tomorrow.
I read somewhere that "one thing you never regret is working hard" which is something I've tried to remember every time I've been tired or lacking in motivation. I don't think that I could have worked much harder for these re-sit exams, so at least I know I've done my best, even if I fail. I definitely know a lot more now than I did the first time I sat the exams, but whether it's enough or not I'm not sure.