I was rereading The Lord of the Rings a while back and one of the things that struck me was how seriously the characters take the giving of advice. In retrospect I think this is one of the biggest blind spots of American culture in general. We act like advice is cheap or even free, both in the giving and in receiving. It's not. Even when solicited. I think we'd all be healthier if we were slower to give advice, even outside of such extreme circumstances.
Works for me. Headaches without. I often wake up a few times each night to drink water to get rid of dehydration headaches. And I carry water with me all the time, thirst all day, headaches when it runs out. (like yesterday). Worse in the desert.
One guy I worked with suffers from extreme debilitating migraines and only drinks about 1/4 of the amount of liquids that I find necessary to avoid headaches. (which is about ~3-4 litres/day). I would tell him if I did the same I'd have major headaches too. But no, he doesn't want to hear it, says water doesn't work. Too dumb perhaps.
Actually I can feel a slight headache now so will go drink some more water to get rid if it. If it hurt more I'd reach for 400mg of ibuprofen or two and, of course, more water.
"Is it indeed?" laughed Gildor. "Elves seldom give unguarded advice, for advice is a dangerous gift, even from the wise to the wise, and all counsels may run ill."
The Mirror of Galadriel:
"Do you advise me to look?" asked Frodo.
"No," she said. "I do not counsel you one way or the other. I am not a counselor. [...] Do as you will."