Well-being integrates mental health (mind) and physical health (body) resulting in more holistic approaches to disease prevention and health promotion. Well-being is a valid population outcome measure beyond morbidity, mortality, and economic status that tells us how people perceive their life is going from their own perspective. Well-being is an outcome that is meaningful to the public. Advances in psychology, neuroscience, and measurement theory suggest that well-being can be measured with some degree of accuracy. Results from cross-sectional, longitudinal and experimental studies find that well-being is associated with: Self-perceived health. Longevity. Healthy behaviors. Mental and physical illness. Social connectedness. Productivity. Factors in the physical and social environment. Well-being can provide a common metric that can help policy makers shape and compare the effects of different policies (e.g., loss of greenspace might impact well-being more so than commercial development of an area). Measuring, tracking and promoting well-being can be useful for multiple stakeholders involved in disease prevention and health promotion. Well-being is associated with numerous health-, job-, family-, and economically-related benefits.8 For example, higher levels of well-being are associated with decreased risk of disease, illness, and injury; better immune functioning; speedier recovery; and increased longevity. Individuals with high levels of well-being are more productive at work and are more likely to contribute to their communities.