If you want to improve your preaching, there is no better way to start by reading every good preaching book you can get your hands on.
Yes, you need a lot of practice. You have to get out there and learn from both good and bad experiences. But beginning with a healthy foundation is critical to fast-tracking your success.
Solidify your theology of preaching by learning from the many great preachers who have gone before you. Leaders are readers. Devour as many good preaching books as you can.
To help, I have compiled a list of my favorite books on preaching.