Arnold's... success happened as part of a process: as the result of clear vision, big thinking, hard work, direct communication, resilient problem-solving, open-minded curiosity, and a commitment to giving back. All of it guided by the one lesson Arnold's father hammered into him above all: be useful. As Arnold conquered every realm he entered, he kept his father's adage close to his heart. Written with his uniquely earnest, blunt, powerful voice, Be Useful takes readers on an inspirational tour through Arnold's toolkit for a meaningful life. Arnold shows us how to put those tools to work, in service of whatever fulfilling future we can dream up for ourselves.