Nice little improvement book, although almost none of the content is unique. Stresses the importance of taking care of yourself physically, maintaining habits that are useful whilst avoiding things that are not useful and continuous improvement.
Another concept explained in this book is different personal communication preferences. Some being analytical, others being more visionary, some being authoritative and others being more communicative, people are often a mixture of types. This book uses different terms from the above although representing this as a compass (which I had heard elsewhere, not in this book) is perhaps a better way of representing this concept. The key is that is different people prefer interacting in certain ways, to interact with them better try to adjust your method accordingly.