I was leading a coaching group of twelve church leaders, eight of whom were lead pastors. All of them were in churches that were inwardly focused. I gave the group one external assignment. I asked them to be intentional each week about inviting someone to church or sharing the gospel of Christ with them. They were to be accountable to me via a brief e-mail each week. The results surprised me, really surprised me. At the end of one year, ten of the twelve churches had begun to grow. All of the eight churches where the pastor made the commitment were growing.