Your business is a reflection of you. I don't think I need to elaborate on that.
I respectfully disagree with Sean I don't think you can fix employees. They are who they are. You can do a better job screening them and then train them before you put them into the field. My experience has been if an employee has gotten off on the wrong foot they are not able or willing to change.
That is why it is so critical to hire responsible people who match your company culture. As long as they have the personality traits you desire in an employee you can teach the rest. If you hire a fast talking , bullshitting liar even if they do work fast you will have problems if everyone else in the company is a boy scout.
Make a conscious decision what you want your company culture to resemble then hire those people. Your life will be much simpler for the effort.
“If I accept you as you are, I will make you worse; however, if I treat you as though you are what you are capable of becoming, I help you become that.”