General guides and interesting info about SEO:
- NYTimes: This Boring Headline Is Written for Google
- How To Write Magnetic Headlines
- 10 Ways Journalists and Newsrooms Can Conquer SEO
- 101 Link Building Tips to Market Your Website
- The Enormous list of Linkbuilding tips, articles and resources
- How to Attract Links and Increase Web Traffic – The Ultimate Guide
Tools to find the best keywords that people use while searching:
- http://www.google.com    (Then just start typing)
- http://freekeywords.wordtracker.com/
- http://tools.seobook.com/keyword-tools/seobook/
- https://adwords.google.com/select/KeywordToolExternal
- http://www.google.com/insights/search/
Fantastic SEO reference guides:
- Google’s SEO stater guide
- Search Engine Journal
- SEO Book
- SEO Moz
- SEO Tops
- Website SEO Grader
- Keyword density tester