Sunday night: putting off starting the work week, I stay up too late (11:30 or so), wake up at 6:15
Monday night: stay up too late because DW doesn't get home work until 9:30, go to bed at 11:30 again, wake up at 6:15 again
Tuesday night: exhausted from staying up too late the previous 2 nights, I'm in bed at 9:30, wake up at 6:15
Wednesday night: feeling better from having got a good night's sleep the night before, I stay up too late (11:30), wake up at 6:15
Thursday night: excited about the coming weekend and only 1 more day in the workweek, I stay up too late (11:30), wake up at 6:15
Friday night: Exhausted from being sleep deprived and having to get up early Saturday morning for a weekly breakfast I help with at my church, I go to bed at 9:30 and wake up at 5:15.
Saturday night: Go to bed whenever, sleep until I wake up--usually about 9 hours.
So 2 nights/week I'm getting enough sleep, another night (Friday) I get close to 8 hours, the rest I'm getting way less than I should. I'll change at some point--but I don't know when.