Hello people

, im close to finishin my online store and would like to know the best and cheapest ways to market the site once finished.
I know abit about SEO etc but thats not what im looking for here. The website will have a huge array of articles so im sure that will help traffic wise.
My questions are, are there any good directorys worth submitting too e.g business directorys etc.
Is there any free places online that offer advertising.
What ways do others currently market their website.
Obviously i will be using offline methods to advertise but its more the online that im needing help with.
Anyhelps appreciated