Mate, I did that last night too. Dragged myself to work this morning with the eyes feeling like they were being pulled out of the sockets... ugh. I shoulda just stayed up and programmed something.
Trying to avoid the caffeine today so I can sleep tonight. I think it's that getting older thing again. Used to be able to knock back bottles of the black stuff with no side effects. Then again, I would have been a poster child for ADD if they had known about it when I grew up.
I didn't believe in evil until I dated it.