Thank you so much for sharing this! I've been reading a lot into this "shorter workday" discussion and, personally, as a freelancer, I set my office hours from 9:00AM - 3:000PM with about an hour for lunch and thirty minutes focused on emails/communication. The rest of the time I work on writing or client work. I do have a stronger sense of flow when I set myself with those hours in which to get work done.

I don't look at my email after 3 or on weekends (unless the notification reveals something important needs to be addressed). THIS is why I became a freelancer and I love to see some of things I've been doing substantiated even more in this piece. You're right. We got out of the 8-hour day for a reason.