Once you have a news reader set up - simply look for the little orange rectangular button on your favorite web page, journal, or newspaper. Sites will often advertise their RSS feed with a button that says "XML" or "RSS."
Most news readers allow you to subscribe by copying the link from your browser and pasting it into the news reader. Some news readers automatically detect the feed when you click on the link, making subscribing even easier! If in doubt, read your news reader's help guide on how to subscribe to news feeds.
RSS feeds allow you to keep up-to-date on your favorite websites or journals by "subscribing" to their feeds. These are free services. New information added to those sites can be easily browsed by visiting a single web page, called a "news reader." The news reader automatically checks for updates and displays them for you!
Unlike email alerts, RSS feeders do not notify you when new content has been added. You need to visit your news reader to keep up-to-date once you have set up your RSS feeds. The advantage is that instead of visiting each webpage individually, you only need to visit your news reader page which pulls together new information from all your feeds in one handy place.
Image originally from:
http://www.lifehack.org/articles/technology/get-more-out-of-google-reader.html
A 4-minute YouTube video.