This document discusses the importance of knowledge sharing and learning lessons from past projects. It recommends that organizations establish communities of practice where project managers can share stories and identify lessons learned. These communities should be both formally driven by a project management office to ensure timely feedback, as well as informally driven by project managers themselves. Bringing lessons to the front end of new projects can help avoid repeating past mistakes. Overall, the document emphasizes the value of learning from experience through open discussion within a community.