I would say spend less time on optional activities and spend a little while to study each day.
What I personally like to do while I'm studying/reviewing is fill out only two note cards. This forces you to find the most important parts of what you learned, and often times, that's what comes on the test :)
The answer is Periosteum.
There’s not really a definite answer- but the most lethal drops occur from 20-50 feet, yet there have been cases of phonomena in which someone can survive a fall from a plane.
