FIND A NEED AND FILL IT

This is the best description of successful salesmanship I have ever heard.  It is far-reaching and covers all the aspects of living and even surviving in this world today.  It is limitless in that the entire world is the market.  It also describes salesmanship as "depression proof".  There are innumerable instances of successful salesmen all the way from P. T. Barnum to Donald Trump, T. Boone Pickens, and John D. Rockefeller.

To be successful as a salesperon requires MANY qualities such as: skill, patience, understanding, cleverness, and downright desire to please.  Also there is always competition for the same market you are seeking.  "Stick-ability" is also essential. 

 "A quitter never wins, and a winner never quits"

Advertising is a big part of salesmanship; if your prospects are not aware of what you offer, they cannot help you reach your own goals.

Goal-setting is another requirement of any successful salesman.  You will never reach your goal without a plan of how to get there.

Honesty and trust-worthiness are essential also.  Your prospects deserve nothing less.

This profession is not suitable for everyone.  If you are not comfortable in sales, it is not wise to continue in it.