Use Heads, Subheads, and Summaries
http://www.gooddocuments.com/techniques/usesummaries.htm

Bricklin, Dan
Good Documents
1998

Abstract:

Use standard typographic techniques and writing features that help the reader find their way through each page of your document. Titles, subtitles, bold subheads between paragraphs, and summaries help the reader find out what they would learn if they read a page or section in greater detail. Let the reader know the bottom line up front. Offer a brief introduction that lets the reader know what information is being presented.