[sorbits]

I’ve had a problem getting up early for as long as I can remember.

Physical work does not work for me. What finally did the trick was sunlight. I moved (a year ago) to a new place which has panorama windows in all the rooms and facing ocean/sky — since then my sleeping schedule has been normal except December/January (I’m in Scandinavia, so we have dark winters).

For scientific explanation see: http://en.wikipedia.org/wiki/Melatonin