I have a problem with staying up too late when I know the next day won't be too demanding, and that describes most of my days lately. I fall asleep in front of the tv (or computer) and then wake up and stay up, instead of hauling myself off to bed.
How late? Late enough to not want to admit how late, because it's embarrassing.
Even more embarrassing is why I stay up late. If I were doing something productive, it would be one thing. But lately, I'm watching either Food Network (not that embarrassing) or Nick at Nite, and there's something about watching The Nanny at 2:30AM that so pathetic I finally realized how stupid it is to stay up so late.
Yes, I'm up late today but that's because (see, I have a real reason) I was posting a video of the kids' piano recital over on my Facebook page, and that took a while, and now that's done and so am I.
I hope this lasts -- if I'm going to be up, I damn well better be doing something useful.