How do companies maintain strong customer relationships in a marketing aspect?

Companies maintain strong customer relationships by
developing customer retention programs. The programs focus on keeping the customer,
maintaining the customer, improving the customer, and utilizing the customer. These can
come in all sorts of variations such as:

1) By selling a
product or service, follow-up with how the customer views that product or
service.

2) Provide any additional, new, or improvised
ancillary support items to the customer.

3) Allow the
customer to make suggestions and offer advice for new products and
services.

4) Use the customer to refer other customers and
reward that customer with discounts, cash, or other
products.

5) Promote that customer as a highly valued
customer in media documents and use quotes to acknowledge
customer.

6) Routinely provide customer with psychological
support such as happy birthday wishes, free calendars and other items that remind
the customer that he is highly valued.