To add the recommendations box to your site, navigate to developers.facebook.com/docs/reference/plugins/recommendations/ and fill in the box. You can customize it easily. Put the Facebook Javascript SDK in your <head> tags;
<div id="fb-root"></div>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
Then paste the box code into the place where you want it to appear:
<div class="fb-recommendations" data-site="http://sethsdiscoveries.blogspot.com" data-width="300" data-height="300" data-header="false" data-font="trebuchet ms"></div>
