Usability Testing on Documents
http://jerz.setonhill.edu/design/usability/intro.htm
This document suggests some ways you might conduct tests to measure the usability of your technical documents. It covers the kind of data you should collect, how many test subjects you need, and how you should treat those subjects.

Writing Report Abstracts
http://owl.english.purdue.edu/workshops/hypertext/reportW/
abstract.html
The Online Writing Lab at Purdue University has information about writing report abstracts. Included are sections on types of abstracts, qualities of a good abstract, and steps for writing effective abstracts.

Writing Abstracts
http://writing.colostate.edu/guides/documents/abstract/
This site covers the various aspects of writing abstracts from the definition and purpose of abstracts to writing abstracts for specific disciplines.