Which skill do you think is preferable in a Medium scale Retail business, Education or Street smart?

Being Street Smart is never a bad idea but a smart person with Education is always 'Icing on the Cake'.

SMART Business Goal , where every successfil business has clearly set and articulated goals to attain specific objectives. Yet, in the world of small business, many businesses lack of forcused goal. " get more business " is a typical reply of a small business owner asked of future plans. 

Whether you have 50-employee company or an empire of one , yours BUSINESS SUCCESS depends o your ability to set and achieve goals.

Both. Both will have great impact if used together.