Never trash-talk your clients
Guys, it doesn’t matter if a client has outrageous demands or is a jerk. You should never speak badly of them. Ever. In fact, don’t speak badly about anybody at all. If you can’t say anything nice, keep your dark, dark thoughts to yourself. This guy’s boss learned this elementary-grade lesson the hard way.

The boss began trash-talking a client immediately after speaking with them on the phone. Little did he know, he didn’t hang the phone up correctly, and the client heard every degrading detail that left the boss’ lips. There was a lot of butt-kissing that took place to keep the client from leaving.