The aim of this report was to identify evaluations of interventions to change health-related behaviours, covering tobacco, alcohol, exercise, diet, sexual risk taking and illicit drug use. The report was based, where possible, on evidence from good quality systematic reviews. The interventions have been classified by the author as having a reasonable effect, a more modest (small) effect, likely to be ineffective or not having enough evidence of effect on behavioural outcomes. Overall, only a few interventions were found to be effective, due to the lack of good quality trials. Furthermore, generalisabilty may be limited as many of the studies included in the reviews were undertaken in the USA.