I have switched for money reasons at first (train costs less if you take it before 6am here). I now get up at 5, and am forcing myself to get productive right

I have switched for money reasons at first (train costs less if you take it before 6am here). I now get up at 5, and am forcing myself to get productive right away. I was blown when I realized after a few days that I roughly get as much stuff done between 5 and 10am that in the whole day before. Just because there is no one else in the office. No phone call, nothing... Nothing would make me change anymore. The only difficult point is to force yourself to go to bed quite early too. For me, it was also a win in fact. My GF goes to bed at 10pm and I used to let her go to bed and code for 4 hours after. Now we go to bed together, which is also better for my relationship :). Win win like ever :)