In more good practices I should still be doing from The Artist's Way, Kate prescribes routine... a date set with one's self for writing at the same time each day. When I have managed to be disciplined about it this, it is always a good time, just me, myself and my words.
I am working on the part about sitting down at the same time every day for the sake of my writing muscles but also in hopes of returning to a somewhat normal and healthy sleep cycle. I'll let you know (or oversleep a bunch and forget to)