Mistakes are natural. We all make bad decisions sometimes and some of us beat ourselves up badly when we realize we could have done better. (including me) But we have a long future ahead of us and we can use past mistakes as lessons to help us make better and wiser decisions in the future. So if you're dragging something from your past around like a big bag of dirty laundry, let it go! Recognize the lessons, forgive yourself and move on.