Management Etiquette Rule No. 1:
This is a case when name-calling is actually good.
Use employees’ names whenever possible—when you recognize them, when you praise them, even when you greet them in the morning. Calling people by name is one of the most basic forms of recognition. It shows you recognize them not only as employees but as individuals.
And no, “Hey good looking,” just doesn’t qualify. And “Nice work, Sparky” is completely out.