Once you have made a commitment to me, I know you are prepared to bust your hump to make it happen. This is a sign of self-respect and maturity. Create an atmosphere of trust. Before you can be accountable, I must entrust you with responsibility. You must trust me to lead you.
Accountability requires mutual trust.
Explain the importance of results. Busy people constantly juggle priorities. You need to know why your commitment to me takes priority over other demands. Negotiate commitments in good faith. A commitment which is coerced, made in haste, or made under duress is weak at best.