RSS Feeds
RSS Feeds allow you to keep up with news and other content added to websites without having to keep checking each one individually. Instead you "subscribe" to the content you want to keep track of using special "News Reader" software or online services which will visit the sites, gather any new items and present them together in an easily browsable and manageable format. For more on RSS and links to popular News Reader services and software, visit the excellent introduction to RSS from BBC News.