All obesity management interventions involve behaviour on the part of the individual living with obesity (e.g., eating, activity, medication adherence), so behavioural change supports should be incorporated into all obesity management plans. This requires a shift in the patient-provider relationship from the provider as the expert (teach and tell) to that of the collaborator, sensitive to the psychology of the person. Obesity management interventions should be evaluated based on how sustainable the behavioural components of the intervention are for the individual. Obesity management plans that are sustainable for the individual should be prioritized over clinician- or program-led management plans. Individuals living with obesity should be encouraged to build self-esteem and self-efficacy (confidence to overcome barriers to the desired behaviour), based on results that are achievable from behavioural efforts and not on idealized ideas of body weight and Nutrition, medical adherence and physical activities are outcomes of psychological and behavioural interventions and not interventions in themselves. Behaviour change strategies underlying dietary, medical and activity programs should be identified (i.e., what are the change strategies by which sustainable changes to eating, medical adherance and activity are achieved?).