Using real-world examples, Ries shows that in industry after industry, it is the companies that resist diversification, and focus instead on owning a category in consumers' minds, that dominate their markets. He offers solid guidance to get companies back on target, explaining how to get focused and how to stay focused. His no-nonsense advice lays out a workable blueprint for any company's evolution that can increase market share and shareholder value while keeping an eye squarely on the future.