February 27, 12:51 AM

Dear Brain,
The immune system to which you are attached is currently fighting a nasty virus and trying to repair an injured knee.  Not to mention all the daily stuff it does.  It functions much better when you sleep.
Everyone will be happier.
Thank you.

August 31, 3:05 AM

Dear Brain,
Today is only the 3rd day of classes.  This not sleeping through the night thing had better not become a pattern. I've given you a solid hour of activity, please sleep now.
Thank you.

July 2, 2011

Dear Brain,
Your incredible (lack of a) sense of direction never ceases to amaze me:

A is where I started.  B is where I ended up.  C is where I was aiming for.

June 3, 10:30pm

Dear Brain,
You have to be awake and fully functioning in very few hours to do morning chores and figure out the day.  This is your last warning to settle down and sleep.  You will regret it if you don't.

May 28, 3:30am

Dear Brain,
If you settle down and sleep instead of stressing, you will do much better on your exams in the morning.  For reals.

May 8, 10:00 PM

Dear Brain,
Thank you for being well behaved today.  I hope you enjoyed your reward of fresh air and sunshine.  Please continue your excellent behavior and allow me to sleep.  Thanks!

May 7, 12:30 AM

Dear Brain. 
You spent all day writing a paper. It is sleep time now. Rest of the papers can wait. Really, they can. Please shut off now.