Two things I have come across say things I am thinking better than I ever could. An interview with Malcolm King when he was warden on Iona Abbey which talks of how renewal might just come out of building community.
Secondly there is this blog article from the Alban Institutes on why churches need to identifying their primary and secondary customers. It simply points out that the church has primary customers who are not yet part of the church. In other words congregations wrongly define who their primary customers are by excluding a very large number. In fact if the church is to survive then it is dependent on people who are not yet members.