Laser Marketing
First of all you must understand your Customer Lifetime Value and specifically the gross profit you make from each new client you make.
Armed with that information, you can go to a tele-marketing company and see if the amount they charge for each new client is less than your
CLV. If so, then you know that you can hire them for a specific period of time as a test and if that test proves itself, then there is no end to the
growth you can make.

Joint Ventures
With a sizeable list, you can go back to those customers with specific offers of products or services that you provide -- either ones that you
produce, or ones that other businesses produce.

Look for organizations that have large numbers of paying members that match your customer profile. For example, look for business
associations. Make an offer to the organization that they can mail their members an offer from you and they will get to keep $x for every new
subscriber you get. Since you know the CLV, you know what you can afford to give away. This should delight the organization because they
are offering something of value to their members, perhaps at a discount, and they make money as well. If possible, get a list of all the members
of the organization so that your tele-marketing team can follow up with each member.
Executive Book Summaries