Do you have a way with words? If so, you can take advantage of your skills to promote your website through article directories that have a large following.
The audience is already created; you just add your backlink from your own articles submitted to these directories for free.
These actually count to your search engine ranking and also are a great way to capture more readers and steer them to your site with a nicely placed backlink. Even if you don’t fancy yourself a writer, you can always pay a freelancer to ghost write articles for you and then submit them to these directories.