The best piece of advice that I can give you is to find someone who has already done all the work and is very familiar with what is going to be tested on the exam. You ask for his help - to be your personal tutor during this entire week. Have him teach you all the important facts and information, adding the details if time allows it. Despite doing all this, you can only pray that you pass and you must learn from this and avoid all cramming in the future.