If you want your preaching to get better with time, it certainly takes work. However, it also takes a deeper well. Experience is just one facilitator of a deepening the well. Our well deepens when God digs it deeper through whatever means He chooses. It might be experience. It might be personal tragedy, relational connection with your church, or the removing of sin from one’s own life. It may simply be a work ethic at study that God honors with a deeper well.