10 tips to become a writer at ezine articles

My girl friend’s told that article marketing is a very important tool in the promotion of the website. He sent the names of some of the website which let us submit articles and in exchange of that article we can put a link of our website. He advised me to stick to ezine articles because it is an articles’ website which has a lot of unique visitors. I do not know about the website and I want to find that how can I become a member or writer of ezine articles. I want to know whether ezine articles is going to charge me some for the letting me become a member of the website. If the procedure is free, which I am sure is not, how can I get myself registered on ezine articles?