Dale Carnegie, well-known author of How to Win Friends and Influence People, compiles time tested wisdom in this book of principles on how to avoid worrying about problems that you generally cant affect. This book is filled with common sense anecdotes from people who have achieved peace and happiness, and from the sayings of philosophers, business leaders and others. Carnegie presents these ideas in an easy-to-understand format. Even though most of the book is a series of stories about people overcoming difficulties, there is a lot of useful information here.