This document discusses principles of professional etiquette. It begins by defining etiquette as rules that allow admittance to closed social circles. Good etiquette makes social and business interactions more pleasant by establishing clear expectations. The document then lists principles of etiquette from various religions emphasizing treating others well. Good manners can open doors even when other advantages are lacking. The rest of the document poses multiple choice questions testing etiquette knowledge in business introductions, thank you notes, cell phone use at meals, table settings, and more. It concludes with tips for avoiding annoying coworkers, proper introductions, and restaurant etiquette.