Read Good Search Engine Optomization blogs. Use Good SEO Tools. Learn about the force & then learn the dark side ... choose for yourself which is best for your site. No tutorials will ever help you as each site has specific needs, learn about it all then use the best tools for the job at hand.
http://forums.digitalpoint.com/showthread.php?t=1048398 I have posted my link to a free seo tutorial. Got positive reviews on it