The first two hours of the day are generally hours that people have high cognitive capacity ... 9 to 11 are usually very good hours for people. And if you come to the office at 9, and you have kind of high capacity, and in the first two hours you do email and Facebook... The hours that you have high capacity are so precious. You have a few of those a day, and they're so much more productive than the hours after lunch where you can hardly function.