I find pressure on my wrist (about 2-3 fingers above the base of the hand) helps tremendously. OTC wristbands from walgreens that do the same didn't help much.

I find pressure on my wrist (about 2-3 fingers above the base of the hand) helps tremendously. OTC wristbands from walgreens that do the same didn't help much. Had to press down on one arm with the other. Not a cure though, so I've never tried a roller coaster with this technique. The headache would probably make me insane.