26. ALT tags <a href=“/images/rock-climbing.jpg”><imgsrc=“/images/rock-climbing.jpg” alt=“rock climbing” /></a> Image Sitemaps: http://www.google.com/support/webmasters/bin/answer.py?answer=178636 Images are great
27. Google’s advice in creating video sitemaps: http://www.google.com/support/webmasters/bin/answer.py?answer=80472 Videos are a good way to diversify
44. The Tweet Effect: How Twitter Affects Rankings - http://mz.cm/mXFt8H A Tweet's Effect On Rankings - An Unexpected Case Study - http://mz.cm/oVIKbj Do Social Signals Drive Traffic? - http://mz.cm/pXuWsZ Twitter shares do still affect rankings though.
54. From Seer Interactive: http://www.seerinteractive.com/blog/using-twitter-and-backlinks-to-build-links/2011/07/28/ From my site: http://www.johnfdoherty.com/link-prospecting-with-twitter-tools-and-apis/ Some Methodologies