A wealth of useful information is available in articles about Marketing and Direct Marketing.
Problem is, no one takes time to read anymore.
One way to motivate more reading is to consider the amount of billable hours some one could be charged to be TOLD the same information and advice that's freely available in articles. The entire collection of articles will not be placed on the web server since this would require too much web server space. Rather, you will use a request form to select which articles you'd like to have access to - and these will be put on the server for approximately 5 business days. Afterward, the requested articles will be removed. Check back in a few days or so for the complete articles listing.