To begin, make sure your feed aggregator is turned on for your site by going to: Top Admin Menu > Administer > Modules > Aggregator (if unchecked, check box and click SAVE). Next, choose which RSS you would like to have on your site. Example: URJ RSS feed from URL: http://urj.org/connect/rss/
Now, find the administrative area of your feed reader by going to: Content > Feed Aggregator. Add the new feed by clicking on "Add Feed". Find the RSS Feed URL by going to your outside source (URJ) and clicking on "copying link location" of RSS feed. Copy & paste link from outside RSS link into the field " URL". Click SAVE. Go back to your feed and click "update feed". Now you will see the feed appear on your navigation block under "Feed Aggregator" link. Make sure your roles have been enabled for this link to appear.