Fried Grey Matter

I managed to get a good handle on my lesson plan today.  If I wasn't sitting here falling asleep I might get it done but I am struggling to keep my eyes open.  Ouch!  I think I have fried my brain, a little grey matter toasted.  I have been trying to finalize things but I keep nodding off and I cannot get my brain to function. I just need to get some sleep and then get the final stuff done on it in the morning.  So close but so far away.