never talk on your cellphone while taking a shit cause you're bound to get some poo on your hand while your wiping and then it'll get on your cell phone and then it'll get on your mouth
In business, never call someone an asshole directly, instead prove to everyone else they are in fact, an asshole by showing that they are wrong tactfully
Don't propose to your hot girlfriend that you've been dating for several years. Wait until she gets fed up with you and moves on to realize that she was better then what you deserve