This document provides tips for using GitHub effectively to share projects and build developer communities. It recommends making a project site to provide essential information for new users, releasing projects regularly to affirm they can be used and allow others to build upon the work, and maintaining an open and helpful approach to contributions from newcomers to encourage participation and learning. The focus should be optimizing for users rather than just developers. GitHub projects have a low barrier to entry, so guidance and dividing work into approachable chunks is important to welcome new contributors.