The main idea is that a church’s strategy – their gospel-sharing, disciple-making method - should be a simple process. Programs should be used to move people along in this process. Complexity dilutes focus and should be avoided, even if it means having fewer programs. Simply put: Do a few things and do them well.
All church leaders should read this, and especially church planters. A church plant has a real advantage in that we are able to implement major structural principles without having to change established programs or traditions.
The concepts are not completely revolutionary – several are drawn from the excellent and even more highly recommended Seven Practices of Effective Ministry by Andy Stanley, Reggie Joiner, and Lane Jones. Nevertheless, this book distills these concepts and presents them in a clear, easily accessible (you could even say “simple”) manner.