When it comes to behavior, I would look into Beth Kanter’s Ladder of Engagement–and see if you can list the behaviors from a lower level of effort (praying) to those taking a higher level of effort and commitment (witnessing). It might spur some good ideas.

With our clients, we call this the acquire-convert-and-retain method. How do we acquire interest, what then leads to the conversion, and then, how can we retain and re-purpose that engagement/interest and empower people to become an ambassador’s of the organization or mission to help acquire others. Let me know how the exercise goes.