After successfully logging in to your site, select the My Hub tab found along the top of your site. Then select the RSS Feed Manager menu item.
From this screen you can manage all of the RSS feeds that you have added to your blog. You may add, edit or delete feeds.
Simply type in the URL of the RSS feed you wish to add to your My Hub page in the box provided. Next, select how many items from that Feed you wish to be displayed. Hit the green + to add your Feed and you're done! All Feeds added will be displayed on your My Hub.