This presentation contains an overview about things to keep in mind when trying to build a community. As one of the first slides already states: you cannot create a community, it is already there. However you can help the community better in several ways. Therefore a model of the different phases of a member in a community is used. Based on this model several actions are defined which a community manager could take to help the community. The last few slides contain an overview of several well known social media cases.