If you want to syndicate your own content, then implementing DISQUS is the easiest. It applies a social login to your comments, but then it also pulls int he content into their distribution network as well.
The real key to any good syndication is the SEO of the site AND the articles. You also have to make sure that it is real SEO tagging and not just metakeyword cramming into header codes -- that will actually hurt your site feed with Google and Yahoo.
A great place to start is PressFeed -- they have some good information and a nominal service to start rss syndication