Travel sickness

It's your worse enemy on journeys or holidays. It can hit in a car when you look down to try and do something. On a plane it can hit on take off or in the air and leave you stuck in your seat, not able to move incase you throw. On a boat it can strike when you see the waves crash or feel the boat rock. Most people get it but have do you cope with it? Write down you ideas in the comments.