This next year I am going to practice what I know to work. This is so basic but it is valuable in all human relations especially in sales. This is from Psychology Today "
As a number of findings show, those who are good at complimenting others gain many advantages. Most obviously, when you become good at complimenting others, you enhance the chances of being liked by them, which means that you get to enjoy all of the advantages of being liked. For example, if you are liked, you will be forgiven for committing a mistake more easily and quickly, and you are also more likely to be chosen as the recipient of others' favors.
More importantly, by becoming good at complimenting others, you get to enhance both your, and the others’, well-being. Any honest person would have to admit that they would prefer to receive compliments more often than they would like to receive criticisms. This is because two of our most important needs—the need to feel important and the need to feel loved—are fulfilled when we receive compliments and are frustrated when we receive criticisms.