This is a great post from Tim Chester about neighbourhoods. In it he asks some key questions under the headings of when, where and what. In essence, understanding our community requires us to understand when, where and how they experience community in order to join them there rather than expect them to come to our expression of community in church. I hesitate to call these "the" crucial questions, but they are certainly some of the key questions that we need to think about from the when, where and what of being church.
Where: Where should you be to have missional opportunities?
When: When should you be available to have missional opportunities?
What: What will church look like for people in this neighbourhood?
The longer we continue to define and describe church in terms of how we want it to look, the further we will find ourselves from the very people we are trying to reach.
Read the whole post (and the previous one) to get the bigger picture.