The Principle of Systems - Are you working in or on the small group ministry?
That's one of the most important points Michael Gerber makes in The E-Myth Revisited: Why Nost Small Businesses Don't Work and What to Do About It, but he applies it to starting a business that lasts. In small groups it is important to keep working in it, but the leader of the ministry must primarily work on it to make it last. How do great companies create excellence even across international borders? By creating great systems that normal, everyday people can implement. If a Starbucks coffee shop could only make it if they had superstar managers or workers, how many would there be? If your small groups can only work well led by superstar small group leaders, you won't have many small groups and your ministry will fall apart. Develop multipliable systems. Write it down, train, evaluate how the system is being implemented.