Twitter is the ultimate service for the mobile age - its simplification and constraint of the publishing medium to 140 characters is perfectly complementary to a mobile experience. People still need longer stuff, but they see the headline on Twitter or Facebook.
I like to read first thing in the morning. I'm addicted to the Kindle. I read a lot of business books, because I feel like I should figure out how to be a real businessman before someone figures out that I'm not one. I really enjoy reading classics as well, which I try to work in once every two months.
One of my favorite programs that we didn't make is Rescue Time. It runs in the corner of my computer and tracks how much time I spend on different things. I realized that even though I was doing e-mail only a couple of minutes at a time, it was adding up to a couple of hours a day. So I'm trying to reduce that.
I do my best stuff midmorning and superlate at night, from 1 to 5 in the morning. Some people don't need sleep. I actually do need sleep. I just sleep all the time. I'll catch naps in the afternoon, or I'll take a 20-minute snooze in the office - just all the time. Our business is 24 hours. Our guys in Europe come online at midnight.