Keep your promises
Most people find it easy to make promises and less easy to keep them, and if you're not careful, it builds up against you. So the first thing to understand is what your promise actually is and why it is important. Once you understand your promise and know why your promise is important, you will not only work very hard to keep it, but it will go on to inspire just about every decision you make moving forward. Think about the places that you love to go to - the places you like to eat, shop or get a haircut. It is highly likely that they have become places you visit not just for the quality service but for the familiar, friendly faces you see and the fact that they already know what you need before you say a word. This kind of service not only sounds really nice but exists because everyone involved is keeping their promise to you. The business understands the promise it made to you, and it keeps its promise. And the business delivers for you.