Since 2009, Adam Bryant has interviewed hundreds of CEOs for the “Corner Office” feature in The New York Times. This month he’s publishing his second book based on the interviews: “Quick and Nimble: Lessons from Leading CEOs on How to Create a Culture of Innovation.” He talked with HBR about why a company’s culture is more important than its strategy — and some of the innovative tactics that CEOs have used to help create a high-performing culture. Excerpts: