2. The SEO History of the Internet, 2002-2009 http://www.greenlightsearch.com/assets/images/history/greenlight-history-of-seo-2002-2009.png
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4. Google Analytics for Facebook fan pages http://www.webdigi.co.uk/blog/2010/google-analytics-for-facebook-fan-pages/ Link generator http://ga.webdigi.co.uk/
6. Folks were tweeting 5,000 times a day in 2007. By 2008, that number was 300,000, and by 2009 it had grown to 2.5 million per day. Tweets grew 1,400% last year to 35 million per day. Today, we are seeing 50 million tweets per day—that's an average of 600 tweets per second. 50.000.000 tweets per day http://blog.twitter.com/2010/02/measuring-tweets.html
7. Use Microformats to increase the CTR from Google (rich snippets) http://googlewebmastercentral.blogspot.com/2009/05/introducing-rich-snippets.html Tips and tricks: http://knol.google.com/k/google-rich-snippets-tips-and-tricks#