If you ever find yourself awake at 5:00 in the morning because your back is hurting and you think to yourself, "My child will be awake in about an hour. I should take some Advil now so that it has time to work before I go on duty."
For the love of Pete, PUT YOUR GLASSES ON FIRST!
Otherwise you will take two Tylenol PMs at 5:00 in the morning and three hours later find yourself laying on the floor having cars driven all over you because that is the closest to "playing" you can get.
Ask me how I know this. Go on, ask me.