One thing that helps to stretch me is to listen to other preacher's sermons. Every year, I will listen to at least ten other preachers, both to hear God speak to me, and also to evaluate their preaching to see what I can learn and how I can improve my own preaching.
Our society is divided by the culture wars into the Left and Right, and the United Methodist Church has always stood historically in the center and has been willing to listen to and to bring together those things that often are found in opposite camps.