All management is the management of promises.
Practice Golden-Rule 1 of Management in everything you do. Manage others the way you would like to be managed.
The way management treats their associates is exactly how the associates will then treat the customers.
If anything in the business is wrong, the fault is squarely with management.
Persons who reach the higher rungs in business management, selling, engineering, religious work, writing, acting, and in every other pursuit get there by following conscientiously and continuously a plan for self-development and growth.