Great managing, great leading, and career success — one controlling insight lies at the heart of each of these, and Marcus Buckingham draws on a wealth of examples to reveal the one thing you need to know. Lose sight of this “one thing” and even your best efforts will be diminished or compromised. Success comes to those who remain mindful of the core insight, understand all of its ramifications, and orient their decisions toward it. Buckingham backs his arguments with authoritative research from a variety of sources, including his own data and in-depth interviews with individuals at every level of an organization, from CEOs to hotel maids and stockboys.