I get email classes from Chris Taylor and the following is about Article Marketing...thought it was a good read:
Here are general tips when using articles....
1. Always submit your article to EzineArticle and Isnare(using their submission service) as these are both well known authority article directories.
2. When possible, submit a single article to only 10 resources, themed sites, article directories.
3. Place different author bio's with different anchor text of links to make the linking look more natural.
4. Link to deep/2nd and 3rd tier pages in the authors bio for increased and well round
SEO campaigns.
5. Research as many themed article sites to your industry and submit to these first rather than generic article directories.
6. Research and build a list of ezines that accept articles and submit each article to these.
7. Make sure that your articles are written well and are informative. The better the article, the more it will be picked up by authors.
Enjoy!