It is easier to get up at 7AM if you don't set your alarm for 7PM.
If your car appointment is for early in the morning they won't even look at it until late afternoon.
Quick stops at my grandparents house have a good chance of lasting for hours, and involving manual labor outside during a rainstorm, and heavy things falling out of the sky.
Intermittent car problems will not be a problem on the day of your car appointment.
Car repairs cost more than quoted.
Poop cola probably tastes a lot better than free car shop coffee.
If you had hardly any sleep the night before, and you got up really early don't stay up till 2AM.