Worrying about motion sickness will make it worse. The week before your trip, get plenty of rest. If youre travelling on a train, always choose a seat that faces forward. When you fly, request a seat near the wings.
Half an hour before travelling, take 2 to 4 grams of dried ginger with tea or hot water.
Sucking on peppermint candies or drinking a strong cup of peppermint tea is also effective for some.