No need to get into state. It helpful if you programmed prior to the likelyhood of getting motion sick for prevention. It helpful when you feeling uncomfortable. Gives you something to concentrate on. Use both feet ... take your shoes off if you can. It works even better if you actually can pick up marbles with your toes so it much better to be out of the confines of shoes.

Ginger is supposed to help supress motion sickness too.

Alex