In all psychosocial areas, collaboration among various professions within a team plays a significant role and contributes to quality assurance. However, the methodological skills needed to work successfully in a team are only minimally taught in training for social professions. Teamwork is assumed, without a clear understanding of the specific know-how required. Based on over 25 years of experience from working in his own teams, providing supervision, and organizational consulting, the author develops a clear methodological concept. Various methods are presented in detail, all of which a team can implement independently. Although the methodological inventory of this book has been developed within the context of teams in social institutions, it can also be beneficially applied to teamwork in other fields.