This is just the barebones outline of a presentation I made recently to some D.Min. students.

1. Invite Jesus’ presence in a big way to your gatherings. 
2. Invite the city to come to church.
A. lots of people
B. on a large scale
C. all of the time
3.  Prepare your people for newcomers a bit in advance of their arrival
Don't get it perfect before you start inviting people.
4. Never underestimate the power of strategic preaching over a several month time frame to usher in change with your people. 
I learned to speak as I went along. I was thrown in the deep end, had to swim before I drowned, but one thing I did right: I've never done a single message without it being a part of a strategic piece of where I was seeing our people going.
5. Stop demanding perfection  (often spelled “e-x-c-e-l-l-e-n-c-e”) from all aspects of your services / gatherings. 
6. If you are the primary communicator, two key words:  “Lighten Up!”