Be a Professional 

What is professionalism?
What does it mean?

Professionalism means you can do a better job than an amateur. It means you can do it better than I can at home. That's what I expect when I go to a professional. You've got the professional equipment and facilities. This is what you DO, right? You should be able to do it better than me,
So, if I go and buy a coffee from a professional barista, I expect a better coffee than I could make at home.
If I go to a mechanic, I expect them to fix my car better than I could do at home.
If I go to a teacher, I expect them to tell me (or show me) something I don't know already.
If I go to a restaurant, I expect a better quality meal than I could make at home.
If I take a taxi, I expect a better driver than I am to be up front at the wheel.
You get the point. Of course there can be exceptions. But in general this is what we should expect from a professional.
Frequently, of course this is not the case. In London, this is often not the case in restaurants, for example.

What about you? Do you consistently offer a better service/ product than your clients could get at home or by themselves or from a friend? If not, it may be time to step up your game.