A company has only one peerless role: chief executive officer. It's the most powerful and sought-after title in business, more exciting, rewarding, and influential than any other. What the CEO controls-the company's biggest moves-accounts for 45 percent of a company's performance. Despite the luster of the role, serving as a CEO can be all-consuming, lonely, and stressful. Just three in five newly appointed CEOs live up to performance expectations...