Those examples dont really pan out, get up 5 min earlier and read the paper in the morning, invest in yourself so you are the better candidate even if it is borrowing a button up shirt from your buddy or family member so you look more presentable during the interview. Go the extra step so you look eager in your actions and not your words.

Sure there are things outside of our control, I will give you that but more times then not confidence lends to our luck. We gain confidence by working to better ourselves. As long as you believe that whatever is holding you back is out of your hands you will be correct.