•Learn about this effective, evidence based approach to overcome the ambivalence which keeps children, young people or their family members from making the desired changes in their lives. •Appreciate the value of a collaborative alliance between practitioner and client which focusses on the client’s intrinsic motivation and values. •Practice the principles of motivational interviewing e.g. expressing empathy through reflective listening; developing discrepancy between clients’ goals or values and their present behaviour; avoid argument and direct confrontation; adjust to client ambivalence rather than opposing it directly; and support self-efficacy and optimism. •Learn about open-ended questioning, affirmations, summarising, reflective listening, sustain talk/discord (formerly called rolling with resistance) and change talk.