Help instead of hinder

I've been observing how humans feel the need to make critical comments about others or about issues. It's almost as if we truly believe that if we make a critical comment about someone or something, we are actually helping the person or the situation. The challenge I believe is to keep those criticisms to ourselves. We can't help the negative thoughts that creep into our minds. They spawn from a long life of either hearing others beating someone or something down or someone criticizing our own actions, appearance or ideas. If we can learn to fight them, lock them down before they slip out, we'd all be better off. Consider that feeling we get once we let out a negative comment or criticize someone else (especially when they're not around). Is it pride? Accomplishment? Usually not. We usually regret it later. If that's the case, privately write it down instead of saying it out loud. Then figure out a way we can turn that negativity into something positive for that person, situation, issue or idea. Attempt to be part of a solution instead of perpetuating or excacerbating negativity surrounding a problem. What small, subtle action can we take to help improve that situation or that person's life who we must criticize?