you know you're tired when...

• you fall asleep on the bed next to Sarah who is chattering her head off as usual
• you wake up on the couch and have no recollection of how you got there or when
• you put your baby in the crib for his nap, lay down on the couch, and wake up only when he wakes up and starts screaming
• you run the washer, dryer, and/or dishwasher with nothing in it
• if your name happens to be Zach, you fall asleep in the stroller at the store, stay asleep while your mom transfers you to the carseat, stay asleep while your mom removes you from your carseat, transports you from the car at the fifth floor to the apartment on the eleventh floor, removes your coat and hat, places you in the crib, retrieves you again an hour later, puts your hat and coat on, carries you from the apartment on the eleventh floor to the car on the fifth floor, buckles you into the carseat, and wakes up only when your noisy sister gets in the car
• you have been at church for six hours with two children
  
• you run four and a half miles and then promptly climb into bed and go to sleep because it is 10:30 at night
• you match the socks only to find some stragglers left at the end; when you investigate the situation further, you find that some of the matches you made are not actually matches at all
• you keep going around in circles in the parking garage in your building and miss your floor completely and have to turn around and go back up to your floor to park
• if you are zach, you completely sleep through the entire diaper change, poop wiping and all