Successful people appear to be traveling along one continual, successful road. What is not apparent is the perseverance it takes following each defeat to keep you on that road. No one I know of has ever experienced one success after another without defeats, failures, disappointments, and frustrations galore along the way. Learning to overcome those times of agony is what separates the winners from the losers.
An earned compliment costs nothing, but its returns are immeasurable. Very humanly, when we are complimented, when our efforts are appreciated, most of us will usually strive to perform even better down the line. What a return on the investment of delivering a few earned words of praise!