I was sick every time I climbed out of the aeroplane for the first 5-6 lessons.
1. Talk to your instructor about it. Mine stopped throwing it around quite so much and recommended extra strong mints - to be eaten when feeling sick. Very effective.
2. Keep your head up and eyes outside. Your instructor will want this anyway.
3. Try to do as much yourself as possible, if your instructor will let you. Talk to him about it. The less he does, and the more he talks you through doing it instead, the better. See point 1...