Simply open the widget option page (Design > Widgets) and select one from the dropdown list.
Visit this page for a complete list of the badges: http://www.mindsharestudios.com/barack_badges/
While the widget should work with most themes out-of-the-box, you can customize the way it is displayed easily using CSS or by simmply adding some HTML or inline styles using the widget options page (see the screenshots).




