I'm working on three major projects at my other job. I'm responsible for testing all business requirements, performing the system testing, and conducting the usability testing. All of these projects have an issue in common, and that's the lack of consistency.

Attention to detail is important in all types of writing. Plus, a lot of the formatting inconsistencies are distracting to the readers/users. 

Some keys to consistency include the following:

1. Proofread all content carefully.
2. Use templates or styles to ensure a uniform look.
3. Provide road maps for your reader/user. Provide headers, footers, etc.
4. Check your final documents for formatting. You should have uniform margins, headings, subtitles, and organization.
5. If there are multiple writers, make sure that someone reads through all of the content to make the style uniform.
6. If you have charts or graphs, make sure to have titles, subtitles, and footnotes or notes for explanatory material. Make sure that you label all of your graph's axes.