Dan Phillips over at PyroManiacs is really pumping out some of the best posts that I have read on the success of a pastor. It appears to be a three part series (Part 1, Part 2, Part 3) with what I would consider as a follow up post exhorting all pastors to teach the entire counsel of God (here).
I would encourage reading the comments in each section as well. PyroManiacs has some of the best reads in the blog-o-sphere.