[Subby]

Unfortunately, it's like most things, you're going to need to play it by ear and learn how your body copes. I don't fly a lot, but I usually do too bad myself, which is surprising considering how much I can get affected by the likes of stress, temp change etc...

Apart from what's mentioned, I find it useful to have a variety of snacks if you can afford the space, from hypo fix to no carb, to suit whatever situation comes up. But probably one of the biggest things is to keep hydrated. Drink water, lots of it, and generally avoid booze. Flying can really suck the moisture out of you.