Offer free downloadable templates skins or themes on your site.
November 29, 2016
Offer an interactive game on your site.
November 29, 2016

Create a helpful online tool that others would bookmark and share on the Web.

Create an online tool that brings value. It can be a financial tool showing trends or calculating one’s costs, an SEO-biased HTML parser or redirect checker, useful info aggregator, social media analytics tool, etc. You can choose to use some popular service API when creating your tool.
Announce your tool via social media channels: microblogging services, social networks, social news sites, etc.
Search for the blog posts with the lists of useful tools like yours, and suggest that they add your tool to the list, too.