Have you heard of the Invisible Guest Theory? When she mentioned it to me, it stopped me in my tracks. Here’s what it means: When you walk into almost any party, dinner, meeting or gathering, most people aren’t really thinking about you. They’re far too busy thinking about themselves. They’re wondering if they sound clever. They’re wondering if their outfit looks okay. They’re wondering if people like them. Which leads to this: A lot of the time, you’re simply an invisible guest in someone else’