To prevent seasickness, I always try and eat something before I get onboard. I’ve found that having something in my belly helps when all those stomach acids are sloshing around. In addition to that you can take ginger pills or other anti sea sickness medication. If you’re feeling woozy try and keep your eyes fixed on the horizon and make sure to get fresh air. If you gotta yack, don’t hold back, sometimes it's the only thing that will make you feel better.