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For the beginner:
SEO:
1. Moz.com has a free PDF download of basic to advanced SEO practices.
2. Google has a 32 page download of SEO best practices
SEM:
1. Google AdWords has a free learning course and certification all online
Tracking (web analytics):
1. Google Analytics has a free tracking system to see results of SEO implementation. They also have a free online learning platform with certification available.