It's great when you guys get along. Sometimes body language speaks louder than words. When giving praise, the adult should move close to the child, smile, and look directly at him. If the child is little, get down on his level or put your arm around him. Praise the behavior, not the child.
Kids love physical displays of praise, like hugs or high-fives.
Give praise right away if you can. Immediate positive feedback is very important. It's important to build children's independence and self-esteem, and giving praise is a great way to do that. When parents praise their kids, they interact positively with them and help form the basis of a loving relationship. Children s Hospital of Pittsburgh offers Positive Parenting classes and other parenting workshops.