I use Sea bands. They have two styles, plastic bands and cloth. I have a pair of the cloth that I have had for 4 years now and will be upgrading to the plastic bands. I typically put them on the night before the plane down to the cruise and only take them off after the first day. If I start feeling the boat I put them right back on. With in 30 minutes I'm no longer feel nauseous. I believe in pressure points and use them for various reasons on a regular basis. You just have to make sure you have them in the right spot. It is about 2 finger widths down from the bend in your wrist and center on the inside of your wrists. I use these because anti-nausea medicine makes me feel even worse.