Michael Frost on Missional
Here is a great talk by Michael Frost given in 2007 at the Global Presbyterian Fellowship meetings in Atlanta. He does a great job of detailing how we must calibrate everything in our churches around the organizing principle of mission.
If you can watch into the first 15 minutes, you will also be treated to a reminder that God is one that chases, seeks and pursues us. This understanding of God as one who is not far away, but here and at work in our cul de sacs and workplaces has a profound impact on helping us think missionally.