As the title implies, this book discusses the significance of personal development as a key factor in success and happiness. The book is a sort of collection of the author’s most important and useful thoughts and ideas, which will help you to get new insights and make your life little better and happier. Since this book in intended to be as comprehensible and easy to read as possible, the author has tried to express his thoughts as compressed as possible, leaving space for you as a reader to form your own opinions on things. The book will give you ideas and inspiration to go out and explore your own route on self development. The author, Hannu Pirilä, is the CEO and founder of HPA Consulting. He works as a Business Consultant and Business Coach, as well as an NLP Trainer, NLP Coach, a speaker in seminars and other events, and as a Mental Sports Coach. In short, Hannu Pirilä is one of the leading Personal Development and NLP Coaches in Finland.