Tim Keller recently released a book simply titled "Preaching." I am reading it with a friend right now who is using what he has been learning from our times together in his ministry. I have been amazed at how timely the readings have been for myself in my preaching. There are a couple of chapters that are downright moving. I couldn't recommend it any higher for someone who teaches or preaches on a regular basis. It will move a person's ministry beyond the dribble of the typical stuff that goes on. Preach the Word!