Cool. I've been having good luck with on and off. The hard part is getting back into an early sleep routine when I have the odd late night. Anything you do to help reset the routine?
I just try not to have odd nights... so far, the worst I did was going to bed at 0:30 - at that time after working 15 hours I was so tired, that I wasn't productive at all anyway, so I decided to call it a day
Thats exactly what I found too, total night owl too.
The people I work for don't always want/need my highest creativity, but my reliable attention to detail and high quality work. It's nice to innovate in the mornings for my own stuff.