You can also have people do guest posts on your site, and do the same on their sites, filling your articles with keywords that will ultimately direct back to your website. (entrepreneur.com)
Some blog owners are particular about only allowing other bloggers to submit guest posts on their sites. (blog.kissmetrics.com)
We are currently accepting guest posts on our site, however, we are very specific about the topics we are accepting content for. (themamaneeds.com)