This document provides tips for cultural etiquette and customs to know when visiting Vietnam for the first time. It advises dressing conservatively, being respectful of social hierarchies, passing items with both hands, and smiling and greeting with "xin chao." Specifically, it cautions against wearing revealing clothing to temples, taking photos of military sites, public displays of affection, and being offended if laughed at since laughter is used to diffuse embarrassment in Vietnamese culture. Understanding local customs is important to avoid offending locals or getting into trouble during travel in Vietnam.