Niche Article Directories

Article marketing can be the single most effective way to get free traffic to your website or free promotion for you affiliate links. Basically it involves writing a short article on a subject relating to the links (usually 2 or 3 are alowed) which you want to promote, then submitting it to these article directories who publish it for you on their website. As well as getting direct traffic from these links it is a great way to increase your 'link popularity' rating so that you place higher in search engine results pages.
But there is one problem - the major websites which mos people submit to are all very general, meaning that although they may get loads of traffic, they may nott many people visiting them who are interested in the particular niche you are writing about. This also affects the value of your links for SEO and how much difference they make to your position in search results, as search engines like google place a heavy emphasis on the relevance of the the sites linking to you.
You can get around this by using niche site in addition to the main ones like EzineArticles.com. I would recommend that you submit to the niche directories first, and then wait for a couple of weeks before submiting to the others, as unique content is also important to google et al and the first site on which your content is indexed by google will carry more weight, so if this is highly relevant to your keywords the article will be working harder for you.