If I’m in a place where I know I can’t vomit, like a crowded public place, or having to clean up someone else’s vomit (I’m a sympathetic puker), if I smile really wide, like crazy beauty queen, it will suppress the urge to puke.

Really only a temporary measure though.

For my car sick kid, I would roll down the window, gave him take his shoes and socks off, sometimes his shirt too.