You’ve probably heard people talking about Craigslist. It’s an online classified system. Most people use it to buy/sell used merchandise.
You can use it to promote your website. It doesn’t cost anything to post an ad, and takes about 5 minutes. When you have a link in your post it will help you with your search engine placement.
Post today, you have nothing to lose but a couple minutes of time.
I would suggest posting every day for a while to test it out. Additionally, creating an account for posting makes life easier.