This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book describes the wide range of activities that need to be undertaken for effective pro-social modelling in the supervisory relationship. It introduces the simple assertiveness techniques and then gives guidelines for using these to give pro-social feedback. The book looks both at motivational techniques and at how motivational work and pro-social modelling can be integrated with practice. It also looks at how responding to diverse individuals is far more than having some knowledge of different groups of people; it is about being willing to learn and develop our thinking. The book discusses some specific differences and similarities among clients that one need to take account of and respond to. Pro-social modelling is not about being nice to people. It is about using a warm and empathetic relationship purposefully to encourage more pro-social behaviour and discourage anti-social behaviour.