Ah, the dreaded "pencils down."
I need to be up and awake at 4AM on Friday, so I've been doing a few things to force myself to sleep one hour earlier every day until Friday.
I'm now at a point, though, where I hit this spot where I'm most active, but I HAVE to go to bed. Doesn't matter what I'm doing...I'm DONE, finished or not. "Pencils down."
I HATE that. Cause I almost always have stuff to do, the energy to do it, and I can't sleep knowing something isn't finished.