A couple of highlights:
When a New York Times reporter interviewed several recent winners of MacArthur "genius" grants, a striking number said they kept cell phones and iPods off or away when in transit so that they could use the downtime for thinking.
Personal-finance guru Suze Orman, despite an exhausting array of media and enterpreneurial commitments, utterly refuses to check messages, answer her phone, or allow anything else to come between her and whtever she's working on. "I do one thing at a time," she says. "I do it well, and then I move on."
This reminds me of an article I linked to in a previous posting about the importance of downtime—which doesn't mean watching TV, but rather uninterrupted time alone for deep thinking or quiet contemplation.