What is Total SEO?

Hello friends.........I want to become a SEO professional. But i am unable to get the grip over this. I am unable to decide what i have to learn and how i can learn to become a better SEO professional. Meta tags preparation, Blogs, Directory submissions......only these are SEO topics are there anything left.Plzzz guide me. Can anyone suggest what are the things i have to learn about to become a professional in SEO