I've found that a "Motion Sickness Watch" works (just do an Internet search), although the electric "shocks" can be somewhat unpleasant. Various over-the-counter medicines also work.

I just avoid things that are sure to make me ill, such as Dash-8 planes and being a passenger in a car. Trains and regular planes are fine. It sounds like you have fewer options, but driving yourself might work, where feasible?