SpiderSavvyBuilding The Web

Here are a few SEO resources that I frequently use:

Keyword Research

YSM Keyword Inventory Tool – http://inventory.overture.com
Keyword Discovery – http://www.keyworddiscovery.com
Wordtracker – http://www.wordtracker.com
Google Traffic Estimator – https://adwords.google.com/select/TrafficEstimatorSandbox

SEO Tools

Marketleap Link Popularity Check – http://www.marketleap.com/publinkpop/
Back Link Analyzer – http://tools.seobook.com/backlink-analyzer/
SEO for Firefox extension – http://tools.seobook.com/firefox/seo-for-firefox.html
XML Sitemap Generator – http://www.xml-sitemaps.com/
Directory of SEO Tools – http://www.seocompany.ca/tool/seo-tools.html

Books

SEObook.com – http://www.seobook.com/buy-now.shtml
Search Engine Optimization for Dummies – http://www.amazon.com/Search-Engine-Optimization-Dummies-Peter/dp/0764567586
Search Engine Marketing Kit from SitePoint – http://www.sitepoint.com/books/sem1/

Other SEO Forums

Webmaster World – http://www.webmasterworld.com
DigitalPoint – http://forums.digitalpoint.com
HighRankings Forum – http://www.highrankings.com/forum/
Search Engine Watch – http://forums.searchenginewatch.com
SEO Chat – http://forums.sochat.com

Blogs of Interest

Official Google Blog – http://googleblog.blogspot.com/
Yahoo Search Blog – http://www.ysearchblog.com/
Live Search (MSN) Weblog – http://blogs.msdn.com/livesearch/
Search Engine Watch Blog – http://blog.searchenginewatch.com/blog/
Search Engine Roundtable – http://www.seroundtable.com