Clean the dishes when you did not dirty them. Fold the laundry when it is not your clothes. Pick up the trash as you walk by when you were not the one to leave it behind. Spend a few more minutes answering questions of someone wanting to learn when you don't feel like it. Rise with your alarm clock even when you know it won't change your day if you sleep 10 more minutes.
Remember that time when? I know you do, now make more of those moments everyday.