Senior executives are often told to focus on big-picture strategy while delegating the specifics of execution. But, according to Scott Cook, cofounder and former CEO of Intuit, smart leaders also spend time on the details of how the organization gets work done at every level, including the front lines. Working with Harvard Business School professor Nitin Nohria, he studied companies from Toyota to Amazon to better understand why hands-on leadership, from the CEO down, works and how to do it without micromanaging. They are coauthors of the HBR article "The Surprising Success of Hands-On Leaders."