A helpful discipline when giving feedback to someone, or when having a tough conversation to help correct someone’s unproductive actions, is sharing three data points. Data points are examples of what the person is doing that demonstrates the bad behavior.
If you have to confront one of your people for bad behavior – let’s say he or she is treating people in the office poorly – you owe that person three examples. There is truly magic in three. Two is not enough and four is too many. If you don’t give three examples, he or she will rationalize his or her way out of it.