Borrow a friend's camera and you'll carry it differently — strap over the neck, lens cap on, set down slowly on the table. Borrowed things get a standard of care we rarely extend to whatever is permanently ours.
Your body is the one item you'll never hand back, which somehow makes it easier to run on four hours' sleep and whatever was left in the fridge.
Try the borrowed-camera standard for a day. Water before the third coffee. A real stop between two things. The attention you'd automatically give an object you'd have to explain a scratch on.