You'll get used to it. Read Alan Cassidy's column in Loop magazine a couple of months ago (I can't remember which month exactly), which explains the physiology of it (in short, what your eyes see and what your balance organs feel are different. As a result, your body thinks it has been poisoned and tries to expel the poison hence
). Keeping an eye on the horizon as much as possible is also helpful.
In the meantime shortly before you go flying, drink a full fat Coke and eat a Mars bar. The above (ginger, etc) tries to prevent the sickness. This prevents the symptoms. The sugar will cause your blood flow to concentrate on your digestive system, preventing the initial symptom of "stomach awareness", if you like. It is analogous to the RAF chaps in the Second World War downing glucose syrup to prevent the same thing.
Also, practice these exercises if you fancy a challenge. It will take a couple of weeks but you'll never be airsick again. Just don't do them near furniture.
http://medind.nic.in/iab/t07/s1/iabt07s1p37.pdf
I was sick for years. I'm now addicted to aeros.