If you are a newbie to SEO then I strongly recommend you check out this Cre8asite Forum thread named What am I not doing? (newbie SEO checklist) The thread goes over actionable fundamentals that you can use for your site, today.
It also links to a resource that I have been telling many newbies to read first. That resource is seoMoz's Beginner Guide. But as you look through the thread, you will notice some well, detailed, and thorough posts on where to begin.
Forum discussion at Cre8asite Forums.