Hi,
I wanted to share a piece of info....
During my prep, I was expecting to get 720+ in GMAT.
But on that day I got 680.
I was a little unhappy that I couldn't cross the 700 milestone.
But looking back, I realized the mistakes I did; something I don't want others to make.
1. For 2 nights before the exam day, get good sleep. This helps in avoiding exhaustion. (I personally couldn't do it since I was having irrelevant problems)
2. Drink plenty of water until some time before the exam. you don't want the mental exertion to dry you up.
3. Give good rest to your eyes on the exam day & the day before the exam. Else, you might have trouble with the last section (verbal), or worse, even before. (I had this problem and couldn't even look at the monitor for quite some minutes during verbal section)
Cheers and best of luck!