Pro-tip to anyone who has to write a document: give #AsciiDoc / #AsciiDoctor a try.
Writing a course syllabus with the AsciiDoc markup language, I get these benefits:
* Can write one sentence per line, which helps me with structure and clarity.
* Trivial to indicate what is a heading and what is body text, which is critical for accessibility and for...
* Automatic table of contents and section numbering
* Easy to do basic formatting like italics, but also more complex stuff, like links to specific sections.
* Works well with version control / diffing software.
* Comments
* Can tell what's going on at a glance (e.g., you can tell where hyperlinked text goes just by looking at it)
Using AsciiDoc requires a little more up-front learning than just using Word or whatever, but it's so much simpler in the long run.
Markdown would probably also work, but I think AsciiDoc is the sweet spot between features and simplicity.