Old Jack Welch, CEO of General Electric during the 80s, studied revolutions throughout history to find out which ones had staying power and which fizzled. He discovered three sources of power that had to be enlisted for a revolution to stick. (Any idiot can start a revolution, but it takes real genius to keep it going). The three sources of power: 1. The police; 2. The media; 3. The schools.
My advice is to invest the first year finding out who the three power sources are in the church and inviting yourself to their homes for a meal, a look at the photos on their pianos and refrigerators, and one simple question: "What do you believe God is calling our church to be doing really well five years from now?"
Keep notes. Watch their non-verbals as much or more than their verbals. Build a web of connections on a whiteboard or wall with their photos and top priorities (i.e., criminal minds), then start connecting the connections by having people with common threads of vision at dessert parties - hosted by the "police" where you affirm their vision and invite them into prayer.
At the end of the year you'll not only know who each group is, but they'll know your heart and be ready and raring to go toward that vision under your wise counsel and leadership.
Can't remember who said this one: "Revolutionaries don't start revolutions. They find it in the street and pick it up."