The tips given are fine.

Personal touch with every customer is the key to success in business. It may not be possible to keep personal touch with every one on the list. But it is definitely possible to keep them in good humour by sending greetings on their birth days, marriage days and any other special events if noted or obtained. To my mind every successful business man should maintain this data along with the date provided in the optin lists. Normally people do not like to part with certain personal data. But once they become your customers or once they take your services and are satsfied, no doubt you are planting the seeds to develop relationship. At this time a separate information page for certain personal data can be sent to them so that it will be possible to send greetings and other personal messages to them which will definitely build good relationship and in turn touch your goals.