When Liz and I (Kurt) were travelling through India, I made frequent use of a simple acupressure technique for nausea. (India has many many poor roads, with rocking, rolling buses driving on them, near precarious cliffs that never seem to have barriers!)
In short, press between the two forearm bones, just below the wrist, and hold. (This webpage link explains it in much more detail.)
Many simple techniques like this will be covered in the upcoming Acupressure Instructor Workshop. Click here to learn more about this special one-day course.