Some people count sheep, but a lot of parents count their hours of sleep. As mothers we are accustomed to waking in the middle of the night to feed a newborn, calm a child after a nightmare or clean up the mess when a wee one falls ill.
Early on, I learned to ignore the clock because I felt better rested when I didn't know how many hours I slept. All the same, I have friends who swear they are tired if they are fifteen minutes shy of their required six, seven or eight hours of shut eye.
Do you track your zzz's?