These are the skills that really matter.
There is one that matters more.
The sales rep or the customer service consultant or the clerk at the hardware store has the option of listening with one of two different motives; most popular is Get That Sale. Most effective is help that customer to find a solution to their problem.
There exists in the minds of many business people the erroneous belief that there are so many prospective customers available that it is unnecessary to go beyond the Get That Sale approach. Many of those folks are now out looking for a job and are adding to the tax burden.
Do not become a member of that group.