One of the hardest questions I ask pitchers is; who are you on the mound? I follow that up with; how do you see yourself as a pitcher? These questions need honest answers. Knowing your identity on the mound determines what direction you need to go in terms of what you need to work on.
The question is, how do we make our pitches better? The answer actually lies within a series of questions coming from you directly. Whenever you are playing catch with either a pitcher or catcher, ask them about your pitches. The answer they give you, whether you like it or not, is great feedback.