Sometimes the best thing in life is a simple rule that promises to solve a complex problem. Bonus points if the problem concerns human behavior, and the rule sports a catchy, easy-to-remember number. Perhaps a few of these sound familiar? The 10,000-hour rule. It takes 10,000 hours to master a skill. The 21-day habit loop. It takes 21 days to form a new habit. The Myers-Briggs Type Indicator. There are 16 personality types. The 80-20 rule. 80% of results stem from 20% of causes. The 50-40-10... Read this story
