Set up your blog with a sidebar where a visitor can search for particular blog posts and also view the various tags you use for each post. (authorsecret.com)
That might be a particular blog post, an ebook, or even a specific page on your website that's converting well. (blog.hubspot.com)
A Content Upgrade is a downloadable resource that is directly related to the topic of a particular blog post. (robpowellbizblog.com)