10. Talking about all of your accomplishments and possessions
“Turning a conversation into a game of The Price is Right by listing all of your recent acquisitions is pretentious and boring,” explains Jodi R. R. Smith, the etiquette consultant behind Mannersmith Etiquette Consulting in Massachusetts. Just because you’re super excited about your new sports car or flatscreen TV doesn’t mean the person with whom you’re chatting will be, too.