Submit articles to sites that would contain the same subject that your site deals in. If you sell car parts write press releases and articles about cars and car parts. Attach your sites description and services at the end of the article as well as the link.

Capture a market and show your expertise and credibility. When you found a good foundation for your site, people will trust you and your site and will pass on to many people their trust. Traffic will certainly increase because they know that you can provide what they need.