Well done with the
MGMAT 740! Generally
MGMAT's quant scaled scores are a little tougher than the real thing, so you are on track to do very well. Along with the tips above, make sure not to over do it on your last day. You want your mind fresh going into your test, so don't take a practice test, or study 12 hours straight. You aren't going to learn anything you don't already know.
The advice that worked best for me was to just review concepts you feel confident about, and some that you just want to refine. Do practice problems, but make sure to work on the EASY problems. This will help you get these right on test day to bump you into the harder problems, and it will help build your confidence the day before the test. You don't want to go with 700+ level questions and hurt your confidence.
Then the morning before your test, pick out 5-10 easy questions and do these questions when you wake up. This will warn up your brain and get your ready for test day!
Keep visualizing yourself getting that Q50, V44 that you're hoping for, pumping your fist leaving the testing center, calling all your friends and family to tell them, and getting into your top school. This visualization will help you stay calm. Read my post here for some last second reminders of the right mentality to take with you:
10-tips-to-improve-your-score-app-with-no-extra-studying-124393-20.html