Since the wave of motivational coaches swept through Germany in the mid-nineties, the term positive thinking has become widely known. In recent years, scientists have explored various facets of positive thinking and its impact on physical health, mental well-being, personal and professional success, as well as relationship happiness. This volume presents the key findings in an entertaining and understandable manner, highlighting both the advantages and dangers of positive thinking. Alternatives are also discussed, along with the question of how one can learn to adopt a more confident attitude.