Write Newspaper Style
http://www.gooddocuments.com/techniques/invertedpyramid.htm

Bricklin, Dan
Good Documents
1998

Abstract:

Write in an inverted-pyramid style, with the conclusion first, details later. Writing with the 'punch line' first, starting with the conclusion, rather than building up to it with careful reasoning may be hard for some writers used to presenting detailed arguments orally. If you think like you are writing a newspaper or newscast, instead of telling a joke, you may find it easier.