Article submission is undoubtedly one of the best ways for getting dofollow one way backlinks also it provides you some direct traffic as most of the directories carry high page rank and they receive vast amounts of daily traffic.
Below I have created a list of article directories for you to submit your site to.
PageRank 4
http://searchwarp.com/
http://www.isnare.com/
http://www.articlecube.com/
http://www.articlebeach.com/
http://www.articlepros.com/
http://www.articlemaniac.com/
PageRank 5
http://www.articlesbase.com/
http://www.articlealley.com/
http://www.web-source.net/
http://www.articlesfactory.com/
http://www.content-articles.com/
http://www.articleclick.com/
PageRank 6
http://www.ezinearticles.com/
http://www.goarticles.com/
http://www.articledashboard.com/
http://www.selfgrowth.com/
http://www.buzzle.com/
http://www.articlecity.com/
http://www.articlepool.com/
What about the duplicate content penalty?
Webmasters have dual opinion on the ‘duplicate content penalty’. I think search engines will of course be looking to filter out the similar content for better user experience, but all the pages those point back to your site still contribute backlinks. Also if you have noticed that every article directory has different navigational and other text all around your article, that may serve your article as a unique content to search engines. Despite of all this, its always better to either modify your posts while doing article submission or write new posts for every directory to provide fresh content to readers and attract them to your site.
If you do use this list or have learnt anything from this post then please leave a comment to show your appreciation.

April 2nd, 2010 at 9:02 am
A profitable and efficient article marketing strategy has numerous elements that all work together to give you a resource called “credibility. If your article marketing strategy offers solution-oriented content, your overall marketing efforts will become a winning strategy. The fundamental element of article marketing is to generate visitors to your site and produce great backinks.
Producing backlinks will give you higher rankings on search engine result pages and consenquently more visibility but if your strategy consists in simply submitting an article or two every week, the results will be probably negligible, that’s why you definitely should invest some money in article submission services. Working on article marketing yourself can get really overwhelming and time consuming.
April 11th, 2010 at 6:18 pm
Useful list of free article directories, i’m using article marketing for a months and i’ve get some useful backlinks. Thank you for these free directories
June 18th, 2010 at 10:19 am
Thanks for your research.
July 17th, 2010 at 8:55 am
Can you also add our article directory into the list ?
Our website is : http://www.hotmake.info
Thanks
July 30th, 2010 at 8:06 am
Article submission is one of the best source for generating traffic to our site. The article directories list which you have presented here are very useful. Thanks for giving your extra effort in writing this article.
August 8th, 2010 at 7:28 am
I think that article marketing is a very important part of SEO, because of the quality of links. By writing good quality articles and building links with it, you can guarantee your website to get higher rankings.