The change is just noise in the data, or normal variability, but they either don't understand that, or don't care. Leaders lead through example. They set the tone, they set the energy, they set the enthusiasm, and they set the ethics and honesty. My ancestor, Captain James S. Lawrence was fatally wounded in the War of 1812. A rare lithograph of this battle scene is displayed on my office wall to motivate me.
Persistence pays off.
The worst thing in sales is to hear a customer rejection. At least I am not dying in battle. I live my ancestor's creed daily. Addressing your question from your article in March's Fast Company on the 50 rules for Leaders during the next five years. What I would add is Coaching.