You can promote a website a variety of ways some of the common ways is via article marketing targetting the likes of Ezinearticles and Goarticles, as well as leaving comments to blogs in your niche, ensure the comments adds value or the site will simply be removed
Free Methods Article Marketing Video Marketing Forum Marketing Classified Ads (Time Consuming) Press Release SEO Paid Methods Banner Ads Texts Ads Solo Ads Media Buys
you contact any massmailservers company a send a lots of mail and do advertisement of site and this way your site promote
there are many technician the promote the websites because without promotion websites is nothing .seo play major role in the advertisement they can calculate your websites what are requirements ,classifieds ,promotion on the websites .
In fact there are many ways ,by which you can promote your sites , this need according to your site type . like my site , i can use facebook fan page , here i really get the large traffics !
You can promote your site through social networks. You also promote your site using popular networks like popular forums. You may spend some money for getting paid traffic by using Adword and else.