Psychological well-being is a subjective term that means different things to different people. Psychological health, otherwise called mental health, is a relative state of mind in which a person who is healthy is able to cope with and adjust to the recurrent stresses of everyday living in an acceptable way. This book discusses topics such as: sexuality as a critical factor for health, quality of life and well-being, the well-being of Russian and Ukrainian adolescents in the post-Perestroika period, participation in sports and its potential to confer numerous physical and psychological health benefits, work-related stress and its relation to ill-health and decreased productivity, among others.