Why am I still awake at 4:30am?

Perhaps I am having a usual bout with insomnia.

Perhaps I am stressed about not getting as much work as I expected for next semester.

Perhaps I am trying to convince myself to grade more papers.

Perhaps I am addicted to playing Gears of War on X-Box Live.

Perhaps I am still hungry.

Perhaps I am wondering why I'm not writing.

Perhaps I am just trying to feel like I actually have some free time by not sleeping.