Using Analytics To Measure SEO Success
http://searchengineland.com/using-analytics-to-measure-seo-success-17770

I’ve previously discussed why rankings are a poor measure of success, but only touched upon how to instead use web analytics to measure SEO success. My hope is that once you have a good grasp of what to review and how to use that info, you’ll be more inclined to wean yourself (and your clients) off rankings reports once and for all!