Don't criticize, condemn or complain. Constantly criticizing, condemning and complaining is what breaks most relationships. Instead of criticizing and condemning, figure out how you can solve the problem together. Instead of focusing on blaming the other person for what they did wrong, focus on how you can avoid the problem next time.
Dale CarnegieLet's not allow ourselves to be upset by small things we should despise and forget. Remember "Life is too short to be little".
Dale CarnegieOne of the surest ways of making a friend and influencing the opinion of another is to give consideration to [his or her] opinion, let [him or her] sustain a feeling of importance.
Dale Carnegie