Alarin--thanks for the thumbs up
and great advice to all in the rest of your message....
Although 3:45am sounds really early, almost polyphasic (not quite!), it was really the adherence to a particular discipline and schedule AND the daytime sleep times that helped this the most, I think.
I totally agree with what you say about listening to one's body clock in general and appreciating when one needs more sleep, like during weight training, for example !
So, time for that guitar now...
Ati