You can do this by reaching out to journalists and industry influencers. Finding an email address of someone can be difficult but not impossible. This article will show you how to find any email address.
Guest blogging and brand mentions are two of the most popular strategies to generate backlinks to your site and increase your ranking.
I, for instance, emailed all tools that I mentioned on my Skyscraper blog post. Here's the exact script I used.
It takes effort to accomplish everything I've mentioned here, as I said at beginning of the post.