It’s the most basic and common method off-page SEO. When you start a new site, you can do it once to help you get backlinks from directories. Avoid paying directories for your site listing, only submit to free directories. The most powerful directory site is dmoz.org.
As for the other directories, I don’t recommend you to waste your time submitting your sites here.
Article marketing is a method where you write an original article then submit it to article directory websites (such as ezinearticles.com). Then you will get a backlink from your article because these directory sites allow you to put 2-3 backlinks inside your signature box (will be displayed below your articles).
For people who believe it doesn’t work anymore, actually article marketing still works. When you write articles, remember that you need to think about three things. First, how that article can bring traffic to your site. Secondly, how this article can rank higher on Google. Thirdly, how it can benefit your site by the link inside the article itself.
When you make the article, make sure you target a long-tail keyword for the article itself. I have seen lots of articles from ezine conquering long-tail keywords in Google. Basically you should already know how it works but maybe it’s very time consuming to do this by yourself. The key is to find someone else to do this for you.
Another important point to consider is, the articles shouldn’t be submitted to all article directories. There are only around 10 article directories that worth your time. The other article directories need months to approve your articles so why should you submit your valuable and unique content to them?
The valuable article directories are:
*Don’t forget Google Knol and articlesbase do not give dofollow links but the traffic sometimes still worth it.
*PS: I don’t recommend you to use random article submission services (even not wlmarketing.com although I recommend it for directory submission) since most of them would force you to pay certain amount of fee to submit your articles to 50-100 article directories. I can say that most article directories are dead already, they won’t even moderate new articles so your articles won’t appear in their websites at all.