It is all about OC -- original content.
"Search Engine Optimization: An Hour a Day" by Jennifer Grappone
"Getting Noticed on Google" by Ben Norman
And if it isn't measured, it isn't managed:
"Scientific Advertising" Claude C. Hopkins
Forget about SEO right now, you don't want really want more traffic, you want conversion rate.
I know people who own websites with hundreds of thousands of visitors per month, but almost 0% conversion rate.