I suffer from migraines and still haven't figured out the triggers. I do know that when I feel the pressure in my left eye I'd better pop a few pills before it gets bad...because ignoring it doesn't make it go away.
I've also tried sitting on the edge of the tub soaking my hands and feet in water as hot as I could stand it with an ice pack on my neck.
I have noticed that when I am overheated one day I'm usually more susceptible the next so staying cool and hydrated definitely helps. And I will NEVER give up coffee. Damn the migraines. Give me java. LOL