This book examines the practical application of Otto Scharmer's Theory U by compiling the approaches of users, categorizing them into a universally applicable classification scheme, and creating an application map from this. This application map enables every practitioner, that is, users of Theory U, to quickly and easily design their interventions based on the experiences of others in similar environments. The book assists consultants and leaders in initiating a knowledge exchange at a higher level of detail among practitioners regarding practical applications. It belongs in every toolbox and should always serve as a reference for planned changes and interventions. The results presented here represent a clear step towards improving user-friendliness and feasibility.