The 90/10 Principle Consider a situation: You're eating breakfast with your family. Your daughter accidentally knocks over a cup of coffee onto your business shirt. You curse and harshly scold your daughter for the mishap. She breaks down in tears. After scolding her, you turn to your wife and criticize her for placing the cup too close to the edge of the table. A short verbal argument follows. You storm upstairs and change your shirt. Back downstairs, you find your daughter has been too busy crying to finish breakfast and get ready for school. She misses the bus. Your wife must leave immediately for work. You rush to the car and drive your daughter to school. Because you are late, you drive 80 km an hour in a 60 km/h speed limit zone. After a 15-minute delay and paying a $60 traffic fine, you arrive at school. Your daughter runs to the building without saying goodbye. After arriving at the office 30 minutes late, you find you forgot your briefcase. Your day has started terribly, a...