We all have invisible pages. Since not all of our sites' pages get organic clicks from search engines, as far as search traffic goes, these pages are "invisible." This is idle real estate on your website that should be doing its job--pulling in traffic to add to your overall traffic flow.
The tutorial below shows you how to use Google Analytics to find 'invisible pages' on your site.
http://www.seomoz.org/blog/find-invi...ogle-analytics
Okay, you've found your list of invisible pages, NOW WHAT?
If you set up your pages correctly, load your url at
http://www.iwebtool.com/link_extractor
and take note of the invisible pages associated keywords
Focus on the keywords in your backlink building campaigns