This book will help you master the basic concepts of mindfulness and connect them to the specific symptoms and challenges facing your clients. It will be useful to everyone: both those who have only recently become acquainted with the concept of awareness and need specific tools for its implementation in therapeutic practice, and those who have already successfully practiced it, but would like to add some more useful techniques to their arsenal. Even those who have not yet used mindfulness in working with clients will find here the necessary recommendations on what tools and how can be used to treat specific problems, such as anxiety, depression or insomnia. The proposed therapeutic arsenal consists of clearly formulated, step-by-step and easy-to-use tools, techniques and skills that can be applied to educate clients, students or themselves and ultimately to improve treatment outcomes.