There are about 14,000 marketing software products for sale right now. In 2011 there were 150. Somewhere in that pile is the tool that got your dentist his last new patient, and neither he nor the tool can tell you which one it was. Half the marketing tools out there exist to make you feel productive. Customers are optional. Here's how that happens. You buy a scheduler and it tells you the posts went out. The email tool reports open rates. The SEO tool says rankings moved. Each one grades…