I knew this, really, I did!

"According to the National Library of Medicine, there are a number of symptoms that present themselves as a result of motion sickness, including increased salivation, which is the body’s way of protecting the teeth from the high doses of acid accompanied by vomit. Enter olives, which contain tannins that, when released in the mouth, work to dry saliva—first eliminating the symptom and then the body’s instinct to follow suit."

"However, the treatment is only effective during the early stages of nausea, when the salivation changes first appear." 

When I am going to fly, I buy a jar of olives.  When we are boarding, I put several into my mouth and arrange them around so I can suck on them slowly.  As I am boarding, as I pass a flight attendent, I ask for ginger ale ASAP.  Between the two, I have been able to curb the urge to use that cute little bag the airline supplies for you, and then for you seatmates.  More?