Petra Rankin has published a post that reminds us that it costs a lot less to keep an existing customer happy than it does to pick up new clients or, even worse, remedy a relationship that has gone sour. One of the ways to achieve this is to keep in regular contact with your clients:
It doesn’t matter what type of business you run, every business can
systemise some form of customer contact program. It doesn’t have to be
over the phone, but it does have to be regular (According to Wendy
Evans who wrote How To Grow your business in 90 days, customers should receive contact no less than every three months to keep them loyal to your brand).