Over at The Reformed Reader, there's a great post up about preaching and the reflections of John Newton:
"Sometimes we think that a successful preacher is one who is well-known, is the pastor of a large church, whose sermons are downloaded by the thousands, whose conferences are always sold out and books are bestsellers. The truth is, these things don’t necessarily mean a preacher is successful in the biblical sense of the term. Heretics and unorthodox preachers can have all these things!
"What makes for a successful preacher, biblically speaking? What is truly successful preaching? Well, it doesn’t depend upon popularity, sermon download numbers, church size, or best-selling books and conferences. John Newton described it well while discussing the sovereign grace of God in regenerating dead hearts: