Because, as Jackson asserts, focused minds produce great work. This is why he advocates “heads down” time: a section of the day for focused, productive work–a sprint, if you will.
The problem, he says, is that we’re usually “heads up,” wading through the sundry stimuli of tweets, meetings, and other assorted tasks. Before we know it, it feels like we’ve sacrificed our career to the fickle gods of email.
The more I read about this stuff, the more I think that creative businesses like ad agencies are really bad at helping their people be creative.