Here's the outline:
1–16, The Book of Mormon proves the divinity of the latter-day work;
17–28, The doctrines of creation, fall, atonement, and baptism are affirmed;
29–37, Laws governing repentance, justification, sanctification, and baptism are set forth;
38–67, Duties of elders, priests, teachers, and deacons are summarized;
68–74, Duties of members, blessing of children, and the mode of baptism are revealed;
75–84, Sacramental prayers and regulations governing Church membership are given.
(Doctrine and Covenants 20, Heading)
In this diagram I wrote "people" instead of "members" because the Light of Christ influences everyone, and because the Church is intended and designed to bless everyone on Earth.