You don't, until you learn just what that is. And, to the frustration of some, it is not a static thing. It changes just as you change. The technique refines itself in the hands of a careful worker. The vision matures and what you accepted as excellent years ago may now be barely acceptable.
Quality is always the watchword and goal.
Too many fads come and go, leaving behind crap that was 'cutting edge' at the time but on looking back was merely hype and poor work accompanied by publicity. I think that first and foremost, you have to actively work at the craft of photography. If you don't, you can have the greatest vision ever but your prints can't show it. And, when talking about the craft, it is not the same thing for everyone. The final prints look great, but the path to them is often a long, tortured journey.