Originally Posted by
Bike Handles
I typically drink enough caffeine to get the caffeine sweats. That's when I know I'm ready to meet my show time. But in all seriousness, I find adequate hydration is extremely important. Trying to eat well and making sure I'm hydrated prior to a redeye or trip in general helps me a lot. Granted coffee de-hydrates you, it's a balancing trick.
I generally try for 4 liters of water per day when I'm flying. Seems to help keep me alert. Helps on red eyes. Coffee helps too. But the importance of hydration is underrated.