Reporter’s Notebook: What is the value of “executive time”?

In this Reporter’s Notebook, John Dickerson looks at smoke breaks, coffee breaks, and “executive time.” It doesn’t matter whether you’re the president or a school principal, it’s wise to take your brain from a sprint to a stroll. But what is the right balance of focused versus free thinking? How do we arrange our minutes at work to reach optimum productivity? We search for those answers.