SEO Learning Resources

I came across several interesting beginnner level articles on Search Engine Optimization (SEO) last week & thought of compiling them all here for easy reference -
Google SEO resources for beginners
Learn SEO in 30 Minutes a Day
Beginner's Guide to Search Engine Optimization
Rewriting the Beginner's Guide - The Outline
The Beginner's Checklist for Learning SEO
The 12 Skills That Have Served Me Best in My SEO Career