Write An Article
One of the better methods of promoting your website is to write an article, not necessarily about your website, but on a similar topic. You will be able to submit your web address along with the article and this is the key to the promotion of your site.
You will need to submit your article to sites that will distribute it for you. If your writing skills are up to scratch and it is an interesting subject, your article will be scattered all of the web and your URL will be posted along with it. This will generate traffic and set up some backlinks to your site.