I used to only be able to write (for myself) between 10pm and 1am. Unfortunately this meant I would spend most of my day exhausted since I would have to get up at 6 to get everyone ready for work/school. I'd spend all day at work, get home between 6:30 and 7:00 at night, play with the kids, do whatever was necessary, put the kids to bed by 8 and then relax (generally reading or watching TV) until 10. Unfortunately, that was a schedule I can only keep up for so long without burnout. Now, my alarm goes of at 4 am, I'm writing uninterrupted between 4:30 and 6:30, off to work, regular routine and in bed asleep by 9pm. Funny thing is, I getting twice the work done now than I was before (not to mention I'm way more alert and less grumpy with my kids).