Heath behavior change is an important task for caregivers. Motivational Interviewing (MI) is an effective evidence-based approach to overcoming the ambivalence that keeps many people from desired changes in their lives. In a warm and empathic atmosphere and in a basic trust in the patient self efficacy for achieving the change, MI is a patient-centered approach to enhance patient motivation to commit them in the change decision. Among critical conditions of change, MI practicing emphasizes on expressing empathy, supporting self-efficacy, rolling with resistance and developing discrepancy. Regular practicing with helping and non judgmental teachers is a necessary condition of a fruitful learning.