#1d: Consider what people hear (not just what you say).
When considering good communication, keep in mind this maxim: "it's not what you say, it's what people hear."
It is not enough to consider clarity from your side only. You must also be empathetic to the listener. What is their context? What do they hope to achieve? And how can your words help?
Consider not what you want to say but who your listeners are and what you want them to hear. Don't expect them to be drawn in by your words alone. Meet them where they are. Speak the language they understand.