Besides the all-important index, I think everyone should also include detailed reference to support their data . Writing skills, spelling checks and proof reading When you are writing, do not try to emulate Shakespeare. Use plain language and simple sentence structures. Avoid and and that and of as if they were the plague. Descriptive language should be used only when it adds to the story.
Most people use too many and useless adjectives.
After you have the full and intimate knowledge of the completed project you are better equipped to introduce it to your readers. Hold up for a moment. Double check every date, every name, every fact - in search of typographical errors and consistent presentation, especially for dates. Edit for grammar, spelling and word choice. Edit to reduce words.