Behavioural-change-related health education programmes represent a mainstay of health care activity. Where adopted, however, the theoretical and practical constructs and constraints are not always considered. The failure of many health education programmes to achieve their intended life-style-related behavioural-change outcomes is often directly related to the complexity of the task itself. Changing a client's health behaviour is notoriously difficult and requires concerted and systematic activities to ensure any measure of success. This article draws upon existing literature to develop a critical theoretical and practical perspective for health education practice in nursing. It aims to explore the underpinning theoretical considerations for undertaking behavioural-change health education programmes. This article also proposes specific recommendations for nurse's current and future health education practice, as a means for facilitating a more structured approach to health education programme planning and evaluation.