No skill is more valuable and harder to come by than the ability to critically think through problems. And schools don’t teach you a method of thinking, you have to do the work yourself. Those who do it well get an advantage and those that do it poorly pay a tax. Poor initial decisions are one of the reasons we’re so busy. With poor thinking, a large chunk of your time is spent correcting mistakes. Good thinking, on the other hand, produces better initial decisions and frees up time and energy.