Consider the future

"Implement practices that help your documentation age well over time"

• Be concise. Don't repeat yourself. Maintainers should have to update the same information in as few places as possible.
• Explain why things are the way they are - help future readers decide for themselves what is still true instead of trusting your bygone context.
• Link to "sources of truth" liberally (also with references) - help maintainer update after the source changes.
• Add created time for your document.
• Collective ownership (team) over all documentation.
• Recognize contributions.
• Encourage readers to feedback.