SEOmoz’s CEO and Co-Founder, Rand Fishkin has put together a list of every website statistic publicly available that he considers valuable. The 56-point list includes:

  • Technical data
  • Ownership/hosting data
  • Statistics/popularity data
  • Search engine indexing data
  • Link data
  • Social tagging data
  • Third-party trust metrics
  • Important directory and site listings
  • Press and media mentions

If you just want a quick assessment of a site’s visibility, try Page Strength, a cool tool Fishkin created with Matt Inman.