When a person comes to a psychologist, he talks about what problem he has and what he wants to achieve as a result of working with a psychologist. In turn, the consultant highlights the obstacles that prevented the client from independently coping with the task assigned to him, and offers a number of tools with which to achieve the desired result. The book “90 days on the path to happiness” is a practical psychological course for anyone who wants to achieve the goals he has set for himself. This is a reference book, an everyday assistant that accompanies a person on the path to his happiness. The book consists of two parts. The first part provides the necessary information about what a person needs to feel happy, and what prevents him from being so. The second part of the book, “Workshop for the course “90 days on the path to happiness,” is a practical guide consisting of daily exercises aimed at analyzing your behavioral patterns that prevent you from freely achieving your goals. By doing these exercises, you begin to develop a new type of positive thinking and new constructive behavior, which ultimately ensures that your dreams come true.