I agree with Chris completely, cake is really good, especially if you have a whole one to yourself.
Motion sickness is a natural reaction by your body that mostly happens in really healthy people, I've read that people who run and exercise get motion sickness worse than people who don't. Before the time of boats, fast cars, airplanes, etc, the only thing that caused a person to see one thing and feel something different in their inner ear, was when they ate the wrong mushroom or something else wrong. Wanting to get rid of the poison, the body says **WOOF!!!** and tosses it. And of course if that doesn't help then it just keeps trying the same thing, it's only defense. I understand you can stop becoming seasick through a lot of different ways, one is simply to get used to it by putting yourself into situations where you could get motion sickness, another is by smoking, drinking, or doing other things that essentially poison your body and give it the same sensation (remember the first time you smoked you got sick and felt woozy and green ?). And then another way is to take away some of the sensory input that makes your body think something is wrong in the first place - i.e. stop the motion, or stop seeing something different, close your eyes. Or lay down and stare at something that is moving to put yourself into sync with the boat, so your mind realizes you aren't sick, it's the whole boat that is moving. Or take the helm so that you can feel the motion of the boat better and your mind has more of a chance to "understand" what is going on, why the horizon isn't doing what it "should" be doing, and why it feels like your moving in one way when you "should" be moving in another.
But mostly cake is good, Chris is right on the money with that.
Edit, went looking for sources and found this on wikipedia.
Originally Posted by Wikipedia
The most common hypothesis for the cause of motion sickness is that it evolved as a defense mechanism against neurotoxins. The area postrema in the brain is responsible for inducing vomiting when poisons are detected, and for resolving conflicts between vision and balance. When feeling motion but not seeing it (for example, in a ship with no windows), the inner ear transmits to the brain that it senses motion, but the eyes tell the brain that everything is still. The area postrema will always believe the inner ear signal over the eyes, as the eyes are more susceptible to trickery (see optical illusion). As a result, the brain will come to the conclusion that one is hallucinating and further conclude that the hallucination is due to poison ingestion. The brain responds by inducing vomiting, to clear the supposed toxin.