Overuse and underuse in healthcare is a chronic problem in most healthcare systems. Inspired by the North American Choosing Wisely Initiative, the Association of Scientific Medical Societies in Germany (AWMF), which actually counts 173 member organisations, decided to address the problem. The aim of the German “Gemeinsam klug entscheiden” (deciding together wisely)-initiative is to reduce overuse, underuse and misuse of health interventions in areas where recommendations of clinical practice guidelines (CPG) are not adequately implemented or missing. Starting point are the positive and negative recommendations of the CPGs, which the AWMF-member societies have developed for more than 20 years, following the manual and rules set up by AWMF. To identify and select recommendations methodological criteria have been developed by a working group in a consensus-based process. The development of AWMF-CPGs follows a methodology that aims to ensure the full integration of evidence, an interdisciplinary and interprofessional perspective, the prevention of bias as a consequence of conflicts of interest and full transparency of the development process.