"Apologize to your significant other that you are so distracted — but between the two of us, it’s really a #sorrynotsorry kind of moment."
From Dan Drezner's "So you want to write a nonfiction book/A few tips for those writers intimidated by the idea of writing something that contains many pages and a spine" at WaPo. It might be very good advice because Drezner has written 6 nonfiction books.
I have more than 6 unwritten nonfiction books, and I'm ever more committed to doing only unwritten books when I read Drezner's point #4: "Ration your social media.... the time suck of these platforms is considerable. Only let yourself go on it for small segments of time, or as a reward for finishing an intermediary goal." I'm a blog supremacist, so I reverse-engineer that advice into do not become distracted by long writing projects. They'll ruin your blog mind.
By the way, I love the illustration at the link, with the caption: "Still life of girl sitting on floor and writing in a notebook. (iStock))" That girl is not writing a nonfiction book. But I identify with her because she looks like she might be jotting down some blogging ideas.