Observation of mistakes

Wrote most of this Christ-mas day:

You know, in order to learn from your mistakes, you must be observant. You have to be able to notice where and how you went wrong in your actions, whether that action was a spat with your sister or a minor car crash last Saturday. 
What led to your actions in either situation? Did you wake up in a bad mood, or was a bad mood created as the day progressed? Were you paying attention to your actions and thoughts in the time that led up to either situation?
Things like that can make a difference in your whole day. You must be able to remove yourself from the smaller situations that occurred earlier, before the car crash, or the fight. You must pay attention, to everything. As Mad Eye Moody (or his impersonator) said, "Constant Vigilance!"