I found this forum page on one night when my girlfriend was complaining of a bad migraine... I stuck four sticks of Celery in a high speed blender, scooped off the top pulp after it settled, and convinced her to drink it, even though she thought it was crazy.
Miraculously, it worked! Within ten minutes, her pain was much improved, and the headache was gone within an hour. One of her coworkers also tried it with similarily effective results. I can't believe how effective something this simple is for a problem that seems to have eluded all solution for many many decades!