Peter Adam provides what is titled Advice To A Young Preacher, but his points are worth revisiting at any age or stage in preaching experience.
This one is challenging when producing sermons in a most individualistic age and culture:
Recognize that most of the Bible is actually addressed to God’s people, not to individuals. Even books such as Luke–Acts, Timothy, and Titus have wider audiences in mind. The gospel is not just God’s plan for an individual Christian’s life; it is God’s plan to create His own people for His glory. The Bible is addressed to God’s people, and we should use it for the same purpose. If you want to know how to preach that way, read Deuteronomy, 1 Corinthians, Hebrews, 1 John, or Revelation 2–3.
Read the rest here.