[pasbesoin]

I don't have first hand experience with them, but I've heard good things about ginger (yep!) with regard to motion sickness, and the British Navy supposedly (per an "outfitter" catalog selling them) has elastic wristbands with a plastic tab/point that presses against an acupressure point in the wrist.

Mums had a 27' sailboat for a while, on Lake Michigan. I was only out on it a couple of times. I found the "keep your eyes on the horizon" suggestion quite useful; going below, out of sight of the horizon, was not a lot of fun.

[antipaganda]

The acupressure wristband works great, until you realise it's a placebo. Then the fucker stops working. I speak from experience.