Know the official post office abbreviations for all 50 states without having to consult a list.
Marilyn vos SavantKnow how and how much to tip people who expect gratuities, even in the case of poor service.
Marilyn vos SavantYou're who you think you are, even if you never admit it to yourself or to anyone else. You may be in the worst position to judge, but you're in the best position to know.
Marilyn vos Savant