Save the drinks for after your "Welcome Back to Earth" celebration. There will be plenty.
Don't give in to fear
I am a coward. I HATE roller coasters, heights freak me out in general, and the few times I've ever gone faster than 100mph in a car were completely against my will. So naturally, the combination of heights and extreme speed should have given me the vapors and had me blacking out the second I was out of the plane. But it didn't.
The truth is, you don't really have a perception of being thousands of feet in the air when you're free falling. The hazy ground below doesn't appear to get any closer for much of the fall, and despite actually reaching speeds around 120mph (terminal velocity), you don't have stationary marks in the sky as reference points. It is the sky, after all. Your brain just thinks you're basically floating with a super-strong fan blowing air in your face. Kinda like a Magic Eye, but with a lot more danger and a lot less eye-crossing.
Once the chute opens, you're much more conscious about how high up you are, but the scariest part is already over.