1. The Lao word for 'hello' is 'sabai dee', usually said with a smile. Touching or showing affection in public will embarass your host.
2. In Laos your head is 'high', your feet 'low', using your feet for anything other than walking or playing sports is generally considered rude. Do not point with your feet/toes and do not have your feet raised/or propped up on tables.
3. Touching someone's head is very impolite! It is polite to gently crouch down when passing someone who is seated. Never ever step over someone in your path. Monks are revered and respected in Laos. However, women should not touch a monk or a monk's robe.