This book focuses on the common dilemmas of anxiety and internal conflict faced by contemporary people, and is a practical guide for adjusting life mentality. The book provides an in-depth analysis of the root causes of internal friction, including overthinking, perfectionism, interpersonal stress, etc. Through specific cases and practical methods, readers are guided to break the negative thinking cycle, establish a clear sense of boundaries, and learn to accept imperfections. It provides solutions from the aspects of mentality adjustment, action implementation, relationship management, etc. To help readers get rid of mental internal friction, reduce anxiety, face life and work in a more calm and efficient state, and regain inner peace and sense of control.