A story Ron Tilley, the former MD of Prchem used to tell a good story about this. A guy called Freddie Phipps used to have pre-selected a route of target customers in London that he would call on month in month out. He'd go to reception say, 'Hi I'm Freddie Phipps from XYS cleaners, can I leave you my card just in case you need our services?' The receptionship would take the card and pop it in her desk drawer. The next and every month, the same thing, so that the recptionist came to know him. Guess who she called when her boss asked her to find a cleaning company? Clever Freddie. And the moral of the story is to be there when a customer needs you rather than foisting your unwanted attentions on they when they don't.
Simon