By getting constant input from whoever is getting value from what you’re doing—be it the person clicking the Buy button on Amazon, the parishioners of your church, the children in a classroom, or someone trying on a dress—you’re in a position to constantly adjust your strategy and more quickly succeed. The idea goes by the somewhat ludicrous name o

Any history of war which treats only of its strategic and political course is merely a picture of the surface. The personal currents run deeper and may have a deeper influence on the outcome.

Blitzkrieg, often translated as lightning war, is commonly misunderstood as simply a faster form of attack - an optimized version of the old format. Instead, the lightning attack of Blitzkrieg was an outcome of superior coordination. Mechanized infantry, tank columns, and dive bombers were not new in and of themselves. What had changed, though, was