seomoz is a good resource. Most seo ebooks are pretty good for beginners too. Once you learn the basics you might also want to check out Matt Cutt's blog too.
Start here. Lesson 1 - Where are your Sigs? Lesson 2 - What site are you promoting? Lesson 3 - What are the keywords? Lesson 4 - What is the exact format needed to SEO the Sigs? This is called link building and it is 50% of the work.