Send the URL of your site to major search engines (Google, Yahoo, MSN), and other search engines that can be found on the web.
Write articles every few days and send them to the proper directories. Be sure to include a link to your site in the author's box. The articles must be optimized for keywords. Submit these articles to the publishers of email newsletters.
Search for related blogs and leave useful comments with a backlink to your site. This is a good way to achieve traffic if blogs are correctly selected.
Answer questions concerning the topic of your site in questions of yahoo.com. Be sure to put a link to your site in each response.
Register at the most popular forums related to our site and participate actively, wearing your signature a link to your site.
Write a press release about your website and submit it to specialized sites. It is important to become familiar with this type of essay before posting.
Post blogs at Blogger.com and Wordpress.com blog with a link to your site and present them to hundreds of blog directories. This will give you good amount of qualified traffic as long as you keep your blogs updated.
Post ads with a link to your site to all sites that sccept free classified ads. Some of them allow the inclusion of active links. If your ad is well written and well-sorted, many people will visit the place.
In the emails that are sent use a signature with a link back to the site, provided that it does not seem inappropriate.
Post links in the main social sites pages, which should contain an interesting profile and good content.
Use simple videos, eg sequence of slides in PowerPoint with voice and music to promote the site.
Try exchange links with other sites that appear in the top positions in Google searches.
Write a a brief ebook or (10 to 20 pages), with a link to your site. Send this to all the directories of electronic books that can be found on the web.