The present 9Marks Journal lays out some of the basics of expositional preaching as well as a few of the mechanics. If you happen to think that applying the text is the work of the Holy Spirit, start with Michael Lawrence's piece. There's a difference between a preacher's application and the Spirit's conviction, he says. Preaching that doesn't apply the text is not preaching, and the ability to apply the text depends on your knowledge of your church. Jared Wilson and Erin Wheeler will help you here.