Walk straight, shoulders back, don't slouch. Proper meal etiquette: Nobody chowed down until everybody was properly seated, and somebody said, “Eet Smakelijk,” the Dutch language equivalent of “Bon Appetit.” Quick correction on improper use of silverware. Greet people with a firm handshake and look them in the eye. Never address elders by their first name. Don't let them catch you doing nothing, or they would find a chore for you to do. Play outside, never inside.