Let's just say sleep counts as productive.

Me: everyone is at work, I should use this time alone to be productive and tackle a big project.

Also me: maybe just lay down for a minute to rest.

3 hours later.

Me: huh, I guess all those days of getting up stupid early, because C is covering a bazillion shifts this week, finally caught up to me.

Also me: wow, I'm old enough I can manage to nap.