The onset of multiple risk behaviors such as smoking, anti-social behavior, hazardous alcohol consumption and unprotected sexual intercourse, cluster in adolescence and are associated with increased risk of poor educational attainment, future morbidity and premature mortality. These behavior go beyond pure 'risk-taking' behavior and embrace behaviors which are ubiquitous in society, such as low levels of physical activity. These behaviors shape adult behavior and the consequences are costly to society and young people.