Feeds
RSS feeds allow you to see when websites have added new content. You can get the latest headlines as soon as they are published, without having to visit the websites you have taken the feed from.
To start using feeds you need a Feed Reader. Depending on your computer platform, or whether you wish to use an online service, there are a number of options available...
Windows: Newz Crawler, Feed Demon, Awasu.
Mac OSX: Newsfire, NetNewsWire
Online: Bloglines, Feedzilla, NewsGator, Google Reader.