I was really stressed before the exam and pretty much feared I could not sleep the night before the exam. I knew it's extremely critical to have a good sleep that night as you can end up with a score up to 100 - 150 point less . So I slept about 5 - 6 hours the night before the last day and
got up really early. Then I did about two hours of very extensive physical exercises ( and I really recommend at least half an hour of extensive exercises each day of your preparation, that will really boost your results ) and started to do the exams ( yes I did the exams on the last day, and I'm sure that pretty much increased my confidence )
In the evening my g/f came from work and we went to the local spa center. Trust me, there is nothing else that can calm you better then a couple of hours of massages and jacuzzi. Anyway, when I got home , I fell asleep immediately as I touched the bed. The morning next day I felt I can do it. And I did