The World Economic Forum blog has an Olivia Goldhill piece that argues for the importance of “wasted” time.

when we spend so long frantically chasing productivity, we refuse to take real breaks. We put off sleeping in, or going for a long walk, or reading by the window—and, even if we do manage time away from the grind, it comes with a looming awareness of the things we should be doing, and so the experience is weighed down by guilt….

The truth is, work expands to fill the time it’s given and, for most of us, we could spend considerably fewer hours at the office and still get the same amount done.

It also has a nice plug for REST, and the Nautilus excerpt of the four hours chapter from a few weeks ago (which has generated a lot of press, proving that you never know what’s going to take off).