The Three Tenets of Direct Marketing
Who?
What?
When?

Let’s discuss WHO.

The mail list is crucial to success. There are demographic and geographic lists that are available to rent. Some of the more popular demographics are:
Age
Income
Length of residence
Home value
Pet Owner
Occupation
Religion
Mortgage Information
Type of dwelling unit

With the knowledge you have of your current customers you can overlay similar characteristics and find some rental lists to augment your mailings. A car dealer could find out the make and model of cars in a particular area and market to those owners specifically. A child care facility might look for families in an area that have children within a certain age group. An insurance company might want to find people that fall into a particular age or occupation group. The possibilities are endless. The more you can define the person you are looking for the greater your ROI (return on investment) will be with your mailing.