I make this point at EVERY training session

Probably there is no other one mistake which salesmen make so often as the failure to get all the advantage out of a sale once made. Even good salesmen are apt to think when a contract is signed that that is the end of the profit for them in that direction. As a matter of fact, there is no other assistance which a salesman can turn to his account so valuable as the good will of a satisfied customer. It is, if properly used, a perpetual, standing advertisement right in the locality where he needs it most.