This post shares 3 simple web metrics to help find the 20% of stuff controlling 80% of your online business because online only Pareto can hear you scream.
Use these three simple metrics to find your long tail:
Rank
% of Total
Running Total
Via Martin (Marty) Smith
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