As an Internet Marketing Specialist, I run into some of the strangest business marketing plans that you ever imagine. Potential Clients tell me everyday that they are not sure about the results they got / get from any marketing effort they employ. This is the very definition of "Insanity". No marketing effort is worth doing without doing the metrics. Here are some other insights you will need to be aware of when you undertake internet marketing (which is something every business should be doing!).
Derek Felbinger, David Trumpler & Andrew Imber.