Dr. Bruce Lowell, a New York internist, urges taking advantage of the endless food set out on cruise ships. Don't stuff yourself with three large meals, which may leave you bloated, but eat five small meals spaced through the day.
Limit your alcohol intake and drink plenty of water, especially in a hot climate. Eliminate high fat foods, which may make you more prone to nausea. Don't read while moving, as a churning landscape at the edge of your vision can trigger motion sickness.
Take a turn around the deck. Circulation of the blood stimulates the body's reception to movement, so the ship's motion will be less disturbing. Cirrus markets herbal remedies and wrist strips to prevent nausea.