Personal learning environments (PLEs) require new ways to motivate and scaffold learners. In particular, practice sharing is of importance for learnercentric approaches in the scope of (technology-enhanced) lifelong learning, as it is an enabler for community building and sustaining. In this paper we elaborate prerequisites for ‘good practice sharing’ and explain how we realized these aspects in our PLE solution named Mash-Up Personal Learning Environments (MUPPLE.org). Finally, we argue for the utility of our MUPPLE approach by highlighting two different strategies of good practice sharing and their benefits for learning and community building.