I have a dog that gets me up at 6 every morning, but that dog is also asleep again by 9 or 10, and doesn't get up again until 3 or 4 in the afternoon. While there's no way I can do that (even if I had the free time to do so) I do make a point to schedule an hour or two in the afternoon to rest if I need to. Knowing that I can rest for a bit if needed makes getting out of bed less of a burden. I realize that few jobs allow for that, but they absolutely should. I probably get more done before 9 than many people do before noon.