We generally move through the day in these three stages, as you say, a peak atroft or recovery.

Now, that's true for our mood.

If you look at all kinds of different measures of mood, whether it is sociologists looking

at the emotional content of tweets to people self-reporting how they're feeling over the

course of the day, in general, our mood follows that pattern.

Peak, trough, recovery.

And then that pattern of mood then has an effect on our performance.

And so you see things like kids scoring lower on standardized tests in the afternoon

versus in the morning.

You see some remarkable research out of the LA Unified School District where kids

who take math in the morning do better than kids who take math in the afternoon in a

significant way.

You see all these horrible things that happen in healthcare.

Some 20 years ago, my guest today, Dan Pink, left his career as a speechwriter for then

vice president Al Gore to kind of strike out on his own as a writer.

Soon after he penned an article for a young company called Fast Company, that was called

the Free Agent Nation.

That became a book that really exploded into public's consciousness and effectively

launched his career as an author over the past 20 years or so.

He has written six huge books, the latest called When Where He Dives Deep Into Timing.

It's one of the things that we never look at.

Are there good and bad times of day, of month, of life to do all the things that we want

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