Book excerpt: Bestselling author Richard Koch shows managers how to apply the 80/20 Principle to achieve exceptional results at work -- without stress or long hours. In his bestselling book The 80/20 Principle , Richard Koch showed readers how to put the 80/20 Principle -- the idea that 80 percent of results come from just 20 percent of effort -- into practice in their personal lives. Now in The 80/20 Manager, he demonstrates how to apply the principle to management. An 80/20 manager learns to focus only on the issues that really matter, achieving exceptional results, and feeling successful everyday while working less hard in fewer hours. A large number of managers -- especially in these difficult times -- feel completely overwhelmed. Their inboxes are overflowing and they constantly struggle to finish their to-do lists, leaving little time for the things that really matter. The 80/20 Manager shows a new way to look at management -- and at life -- to enjoy work and build a successful and fulfilling career.