Starting from real examples of exciting and successful communities, it is demonstrated that the first priority is to manage evolution: focus the attention on development and balance of knowledge, networking and facts in the whole community at different levels of communication. Then, there is a proposal for a best practice: show the big picture and involve a few people that understand the project and believe in it, asking feedback; create a physical/virtual place where it is easy to "get the facts" and "get the knowledge"; tell users criteria to discuss and improve knowledge and facts; propose few channels and ask for agreement; propose referrers and let them be judged by community; define how a user can become a referrer; make efforts to give referrers role to users who demonstrate results (provide facts) in interest of the community and the project.