There are many places online and even offline to submit your articles for marketing purposes. If you want to get some local attention you can submit your artciles to newspapers and magazines, often they will run them in a small section about local business and include your bio box. This often goes for trade related magazines as well. Look in the back for editorial information and contact them to find out about their submission process.
Online you can submit to directories and articles websites of all sorts. The nice thing about this is they often have good PR and you will get a link from the directory and from anyone that uses your articles as well.
The list above is just a small sampling of places to get started with submitting your article for your marketing campaign online. There are literally hundreds of these websites that you can submit your unique articles and get targeted exposure in return.