About Yahoo indexing
Submitting articles to directories is still an excellent link building method. It provides you with 100% contextual back links that search engines love. You also get traffic for your site courtesy of the link in your author bio. You can take this a step further and publish your article on blogs, as a guest writer, or ezines. You do have to approach bloggers and website owners, but you get some control over where your article is published. You can even do article swaps, allowing you to gain content for your own website. About a year or so ago, social bookmarking was a much hotter way to gain back links. However, it cannot be ruled out since it's still effective, if you can manage to pull together a good bookmarking site list.