Does this sound like you?

Wake up in the morning. You have about an hour to prepare and get to work. While you're eating breakfast, you read Hacker News. Multi-tasking. Now you have finished eating breakfast. Yet you're still reading Hacker News. You just gotta finish those last few links. And maybe check up on your email. Then you realize you've wasted minutes of an already tight schedule and you really got to rush it to make it to work on time. You arrive maybe 5-15 minutes late and a little flustered because you were racing.

Then you realize you could have just left the house quickly and read Hacker News at work, on the clock. Yet you'll make the same mistake tomorrow.