Good luck for all of you taking exams. I thought that they would all be over when I finished uni, but noooo, I think I must have done 10 or so since then.
From the litereally hundreds of exams that I've done in the past, the best thing that I can recommend is to get your head down and do some. I know that you'll sit there thinking "God, my room needs a tidy so I'll do that first" or "I'll just have something to eat first" but just make sure that you get started on it and the rest will follow. That's the hardest bit. Take a few minutes off every hour and chill out, but make sure you start again.
As for revision methods, then I'm a big fan of past papers. They generally all follow the same format and as long as you start to understand the questions then all should start to fall into place. A good thing that I found was trying to imagine yourself in the exam answering the question, dunno why but they always seemed to get into my head better that way.
Just remember that a few weeks revision now will may effect the rest of your life. Lets say you spend the next 45 years at work, so you need to work hard and make sure that those years are doing something you enjoy. A bit of hard graft now will pay dividends so you aren't doing something you hate for the rest of your life.
Revision is a skill that you have to learn, it doesn't come naturally and you have to work on it. Tell you brain who's boss and get down to it.
Good luck guys, I remember what it was like and I don't envy you. And if you get stuck with you maths then let me know and I'll try to help (not that you should be posting on here, you should be working).