> when I'm not in the office, I'm not working

This resonates very strongly with me. A "wfh" day for me means I get half as much done. My home is where I keep all my distractions!

> You can put together a logical argument, a coherent or strawman proposal, and discuss things at length point by point. It's much higher bandwidth. But too few people read long emails

My trick for this: I write the email, then I go back to the to start and write a 3-4 sentence summary of the rest of it. Often doing that leads me to delete the rest of the email entirely. Always check: are you writing at length to help someone else, or just to clarify your own thoughts?