Dialectical Behavior Therapy: A 3-in-1 Guide to DBT Skills for Anxiety, Emotional Regulation, and Personality Disorders presents a comprehensive overview of evidence-based therapeutic approaches designed to improve psychological flexibility and emotional stability. The book integrates Acceptance and Commitment Therapy (ACT), core Dialectical Behavior Therapy (DBT) components, and cognitive-behavioral techniques to explain how thoughts, emotions, and behaviors interact. It explores foundational concepts such as mindfulness, acceptance, cognitive defusion, psychological flexibility, and values-based action, while also outlining the theoretical background behind third-wave cognitive behavioral therapies and their clinical applications. Structured as a practical and educational resource, the guide examines anxiety disorders, depression, borderline personality disorder, overthinking, stress, panic symptoms, and difficulties with emotional regulation. It details therapeutic models, structured interventions, skills training exercises, and coping strategies that can be applied individually or within clinical and group settings. Readers will find explanations of mindfulness practices, cognitive restructuring methods, behavioral activation strategies, and tools for improving self-awareness, communication skills, and distress tolerance. This book is intended for adults seeking structured guidance in understanding and managing emotional and behavioral challenges, as well as students, mental health professionals in training, and practitioners interested in integrative psychotherapy frameworks. Combining theoretical foundations with applied exercises, it offers a clear and systematic approach to developing long-term emotional resilience and value-oriented behavioral change in both personal and therapeutic contexts.