Transforming Regret into Resolve

Somewhere I read that regret may be the least useful emotion. Guilt can help keep our behavior in line with our morals. Even shame may have utility if it prevents harmful acts which might be exposed to others. Regret is personal knot within us and can lead to self-loathing or even to paralysis of action. It occurs  after an opportunity is missed, a misguided action is made or the "wrong" path is taken in our lives. Since it is  virtually inevitable and nearly universal, regret must be turned into a tool. When buried, similar choices get repeated. If others are blamed, it serves only to damage our relationships. If acknowledged and "defanged",  could these thoughts become more benign? Why not use the memories as armor with the ugly side facing outward to avoid repetition? Paradoxically, if a list of major regrets is combed for the common threads we can see possible pitfalls ahead. If financial- alarm bells need to ring prior to any decision involving money. If romance is major- the sirens need to blare before committing to a relationship. If career based- more patience and advice from others may be prudent prior to action. In effect, we need to admit a weak spot to be more ready for battle. Elements of sorrow may always remain, but if better decisions can be built on and sustained, there will be reduced fodder for being down on oneself. Metaphorically, the juices that fuel the pain of regret must flow to the strength of our resolve to act better in our own interest. This will improve our success rate when "the next time around" arrives.