A simplified review of the 80-20 rule in sales.  The Running Total is an interesting parameter to be considered.  Need more on "Profitability" fractal from @Martin (Marty) Smith

Success metrics for CONTENT MARKETING are:

 - Traffic
 - Engagement
 - Social shares
 - Back links
 - Conversion rates

Click to learn how to measure each.

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Eight data myths that marketing people believe that get them fired:

http://www.kaushik.net/avinash/silly-marketing-data-strategy-metrics-mistakes/  

Beyond Brilliant! @avinash