Oscar Hartmann is an inspiring example of an active person. While some were worried about rejections in their work and personal lives, he used every obstacle as a lesson. Book Just Do It! Keep it simple!” - a reflection of the key principles of a well-known entrepreneur. To acquaint you with their content, we have collected the main ideas in an overview. With its help, you will take a fresh look at the difficulties and get the necessary motivation to overcome them.The text of the review is not a replacement for the original work. The editors recommend the book “Just do it! Keep it simple!” Oscar Hartmann to read.