+1. I remember back when Conde Nast Traveler ran that article about melatonin being such a great find. It only gave me a headache. People saying "Why don't you just go to bed earlier the night before the flight?" also don't get it. Having a strong circadian rhythm isn't easy.

(Oh, and trying to explain the concept of jet lag to a local in Thailand who has never been out of their country is usually futile. Maybe they've woken you up after falling asleep at the restaurant at 8 p.m. or so.)