In the discussion of sales and service after the sale that follows, please remember this term: Clamshell Styrofoam to-go containers.

Sales training isn’t new. That rule applies to linen, uniform and facility services companies that rent or sell products to their customers, to the companies that sell products to commercial laundries, or to any other industry. The same goes for everyday life, even when you are simply trying to sell your neighbor on forming a friendship.

Literally, thousands of books about sales techniques have been written, published, bought and sold. Sales consultants are a dime a dozen—I hate to say—and ...