...think clarity, relevance, sincerity, concision and transparency.

...always budget enough time for at least two editing passes. There is a lot less pressure to get it right the first time when you know you'll have another crack at it.

...I highly recommend OmniOutliner) to compose and edit my emails. By never letting the text into my email client until it's fully baked, I remove the temptation to just dash something off without reading and editing it, and I prevent myself from unleashing a nuclear flame while upset.

This has saved me from sending out a few messages I'd have regretted.