In the shower I put conditioner on my face thinking it was soap.
After changing 9 diapers and giving 3 baths in a row due to blowouts and pee hydrants, I put him on the couch to sleep and forgot to put on a diaper. He woke up screaming in his own pee. (Oh man!)
I lost my keys on the way to the front door from the car. I couldn't find them and found out someone swiped them.
5 tips for preventing exhaustion
New Mom Exhaustion
(easier said than done.)