Psychosocial competence is a person's ability to deal effectively with the demands and challenges of everyday life. It is a person's ability to maintain a state of mental well-being and to demonstrate this in adaptive and positive behaviour while interacting with others, his/her culture and environment. Psychosocial competence has an important role to play in the promotion of health in its broadest sense; in terms of physical, mental and social well-being. In particular, where health problems are related to behaviour, and where the behaviour is related to an inability to deal effectively with stresses and pressures in life, the enhancement of psychosocial competence could make an important contribution. This is especially important for health promotion at a time when behaviour is more and more implicated as the source of health problems. The most direct interventions for the promotion of psychosocial competence are those which enhance the person's coping resources, and personal and social competencies. In school-based programmes for children and adolescents, this can be done by the teaching of Lifeskills in a supportive learning environment.