How to prevent being car sick

I used to be horribly car sick all the time, until I learned this!

While in the car, keep a window open, to keep yourself cool, and keep the car well ventilated.

Look at the floor throughout the journey, somehow, this helps!

Alternatively, look outside of the window, an find a point that is far away, keep watching until you get close to this point, then choose another. Etc, etc.

If you are the driver, I'm afraid I can't help you, sorry!