Seeking out the flaws or limiting factors a sales person might have should only be addressed once improvement has clearly been made. Not because it wouldn't be beneficial to one's success but because focusing on what works is far superior. For every trait, a salesperson has a positive and negative aspect. There are two sides to everything.
At one end you are quite successful and the other end you are not. Anyone can become a great sales person by empowering every aspect you have that is positive.

If you could recognize what you do well for those things you consider flawed in you, then it would be beneficial. Most people however cannot make those distinctions. It's no different than a professional baseball player taking extra batting or fielding practice because they have been doing poorly at the plate or on the field. This is not only unproductive, it is counter productive.

A teenager who buys into any limiting notion such as 'they are a bad person', or 'they have a weak immune system', or 'they are athletically inferior', or 'unlovable' or that 'they are not good at sales', have accepted a condition of little possibility. This creates an artificial illusion which can be as solid as you can imagine.

You and I know people who would rather suffer the consequences of asthma than consider the possibility that the symptoms might never return. They would rather live their life thinking that there was nothing they didn't already know, the knowing of which would have their life be happy and joyful. There are people who had the desire to be in sales and convinced themselves that they were not good at it and never would be. They just knew they could never earn a living as a happy, joyful and wonderfully satisfying salesperson.

Every person in sales can be what they want by defining what they consider a successful sales person to be and then focusing on each of those aspects that correspond to him. Great sales people love what they do. Are you 'loving' what you do? Great sales people make sales. Do you? Great sales people enjoy the feelings associated with making a sale. Do you? Great sales people act like great sales people act, are you?

You cannot know yourself to be a successful sales person and an unsuccessful sales person at the same time. Which ever gets the dominant attention becomes the belief and assumption, and it becomes the existing reality. Too simple? Now that is hard and I know it, but everything that you are attracting is occurring as such. Clear away all the negative feelings in your life so you are not burdened by them. This will create space for what you want. Give your attention to nothing that will have you feeling 'down', it is the source of resistance preventing you from attracting positive outcomes.

A great sales person enjoys what he does. You say well of course he does, he's making sales. Actually it might be that because he is enjoying it more is why he is making the sales. It goes to that question I often ask, "Are you feeling ecstatic because of all the sales coming your way?", or "Because you have been sustaining a state of ecstasy, sales have been coming your way?"

I would never invest in a person to be on my sales force if I could not tell that they were willing to invent themselves to be an even better sales person tomorrow than they were today. Furthermore I would want to know if they were willing to truly enjoy being sales person. If they were, I'd guide them to discover the power of bringing happiness and joy to their work.

You are having fifty thousand or so thoughts a day associated with your sales adventure. Are you thinking thoughts that are dominantly joyful or would you say they are filled with doubt, disappointment, skepticism, negative expectation etc. Great sales people maintain lofty ideas and expectations for great results. They are not concerned so much with making the sale as creating the best mental environment for a history of future sales.
Great companies know the power of having people see them as a strong and solid company. They will provide a service at no cost to you for they know in the long term it will reap them far greater benefits.

What are the characteristics of a person who authentically has 'learned' to know themselves as a 'great' salesperson? A great sales person enjoys what they are doing. A great salesperson enjoys the success of their fellow sales team. A great sales person increases his net value on every interaction with a potential customer whether a sale is made or not. A great sales person knows that success is measured by the amount of joy that is experienced throughout each encounter.

Great sales people do not worry about how many sales they made or did not make, they know they are an attraction for the people seeking to rendezvous with them. They don't manipulate or strategize to make a sale. They neither tell long tales nor brag about how good they are. They simply enjoy the opportunity to create the space for another to be happy. Just like the farmer in the field, he trust that he will reap what he has so sacredly tended to.

When you understand that it's energy first your perspective changes dramatically. You begin to learn that you cannot 'fake' it as a salesperson. You might think you can fool someone, but over time the balance will turn in the other direction. Karma, people would correctly conclude.