Whether you have been to one wedding, or countless weddings, there are unwritten rules. Chances are, you already know these rules, but if you do not, here are 16 ways NOT to embarrass yourself, the bride & groom, or any other guest(s) while celebrating your best friend’s big day.   Please, please, please… DO: 1. RSVP in a timely manner, if not immediately. The sooner the bride and groom know