I'm the early-to-bed, early-to-rise type, when the sun goes down I'm thinkin' about bed... so during winter, 8:00-9:00 Pm is usually bedtime for me. I get home from work 'round 5:30, give-or-take, and get the fire goin', then around the time my eyes are gettin' heavy I'll fill it up and damp it down a bit. When I get out'a bed around 4:00-5:00 AM I stir-up the coals and load 'er up... and if it needs it I'll add a bit more before headin' into work around 8:00. Seriously though, we rarely heat the house warmer than 71[sup]o[/sup]... try and keep it right close to 70[sup]o[/sup]. Most mornings the house will be down around 65-66[sup]o[/sup] when I get up, and around 68-69[sup]o[/sup] by the time I head out. The wife is home most days, but she rarely adds fuel to the fire... except on those bad-azz cold, windy days.
Now there's always a few winter nights with temperatures dropping into negative numbers, wind blowing, nasty cold out. On those nights I don't damp down the fire much, and just seem to naturally wake around 1:00-2:00 AM, toss in a few more splits, take a pee, and go back to bed... maybe a half dozen or so nights a year.
We live in a 100-year-old farm house with no insulation; I seal up the drafts... plastic over windows, weather strip doors, etc. Really though, it doesn't seem to matter if the overnight is 30[sup]o[/sup] or 0[sup]o[/sup], the house sheds heat at about the same rate so my routine works most all winter. The exception is those few nasty cold, windy nights... that wind just seems to suck the heat away, which requires a bit of alteration to the routine (hotter fire, more wood, more often).