You know you're tired when....

...you can fall asleep sitting in a chair working. I believe I sat upright and slept hours last night with my hands on a keyboard.The last thing I saw was 4AM on the clock. Doing schedules and analyzing data and planning promotions. That's glamourous stuff to be doing all night.

...you know you are tired when: you put ketchup on your own hot dog. And you don't even like ketchup!

...you know you are tired when you can't find the words any more and just point to things as a means of expressing what you want.

...you know you're tired when you consider coffee as a priority, not a beverage.

--you know you're tired when you fall asleep before the child you're reading to.

...you know you're tired when you start setting 6 alarms in the morning because you already sleep through the first 5.