This book is a self-management guide and personal workbook for PhD students, postdoctoral researchers and principal investigators. It contains theories and exercises around time-, life-and career-management that has been specifically adapted to natural-and life scientists.The exercises will show you where your time goes and how to effectively find more time for the things you like to do. It will help you to carefully design your life, guided by your personal-, friends- and family missions. At the end, you will engage in more meaningful activities, whether it is going for a long walk in the mountains with your dog or a training course that will help you advance in your career.The content of this book regularly updated. It is aimed primarily at PhD students, postdoctoral researchers, and principal investigators in the natural-and life sciences, however much of the exercises and information will be a useful reference for people working in different fields as well looking for an improved self-management strategy.