Most likely, you are working in an area where others are also engaged. They constitute a network of like-minded people and the network can be used to publicize your site. If related sights will link with yours, visitors to their sites will be pointed to yours.
You can also contact professional or other organizations in your field and tell them about the site. They might be able to mention it in their newsletters.
Finally, by including the URL (Universal Resource Locator -- your site’s address) on all of your publications, business cards and e-mail will help bring people to your site.
