Fifteen years of experience and some research has convinced me that effective coaching is a key ingredient in any church planting movement. One of the best resources for coaches is Simply Coaching by Tom Wymore. I met Tom at the Church Multiplication training with Ralph Moore in Hawaii. He's a great guy and a good coach.
The information in his manual alone is not enough to make you a good coach. But it's a great start. Download it. Read it. Grab someone who can put up with you and start coaching. Find an experienced coach to give you some honest feedback.
Who knows, you might just change someone's life and ministry.