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.