How can I be the best contractor ever?

[Ree Somes]

As a young contractor I am confident. My customers are happy. My financial house is in order and my eyes are on the prize. I want to grow into a top tier contractor.  As I search for and onboard employees I need a clear vision to convey to the new staff. Part of this will include client expectations. 

I want to hear what are the best contractor interactions you have had? What are the worst? What does every contractor need to do better?  Thanks BP community for your answers. I will use these comments to help finish my vivid vision.