Today I'm going to share an example of how you can use RSS to help follow your beat. I'm going to use Yahoo, which now allows you to create custom RSS news feeds.
First you go to Yahoo's RSS page, http://news.yahoo.com/rss. Below the list of canned Yahoo RSS feeds there's a box that says "Create your own RSS news feeds."

Say you want to follow whatever's written about Sen. Mitch McConnell. Enter "Mitch McConnell" in the search box, including the quotes. The quotes make it so you're searching for a phrase, as opposed to the individual words. That means you will get any pages where the words Mitch McConnell appear together but you won't get pages that mention Mitch Jones buying a house from McConnell Homes.
When you click the search button you get a page that looks like this:

This is called XML. RSS is a form of XML, which is just a way describing information that makes it easier to share. It's something like HTML, the markup language used to create Web pages.
Many sites tell you they have their own RSS feed by displaying a small orange square that says RSS or XML. Here's an example from the C.A.R. Report, which has a feed:

If you click on the icon you'll get an XML page like the Yahoo! page Mitch McConnell above. But you can also just copy the link by right clicking on the icon and choosing "Copy" (in Internet Explorer) or "Copy Link Location" (in Firefox). You then paste the address into an RSS news aggregator, which is a software program that gathers RSS feeds from multiple sites so you can read them easily. Many are free. Some news aggregators and Firefox automatically detect whether a page has an RSS feed, making it easier to "subscribe" to them.
You choose which feeds you want to follow. At the moment, I track about 200 RSS feeds on journalism, programming, computer-assisted reporting and other things that interest me.
My news aggregator of choice at the moment is NewsGator, which you can use for free on the Web or you can buy a $30 version that lets you read RSS feeds in Outlook along with your email. I've also tried SharpReader, My Yahoo! and Bloglines. All are free. Another good one that costs $30 is FeedDemon.
Anyway, you would copy this address from Yahoo:

And paste it into the add-a-feed box in NewsGator:

You tell your aggregator how often you want to check your feeds. Typically aggregators do it every hour, but you do it once a day or however often you want. Yahoo gathers all the news sites for that mention McConnell and combine them into an RSS feed. NewsGator and other aggregators display that and other pages with a headline and a short summary so you can easily scan them to decide whether it's something you want to read. In this way you can check a lot of Web sites very quickly.

You can then click on the link to go to the original page if you want to read the entire story. Many RSS feeds, such as for blogs, include everything posted so you can read them in the aggregator without ever having to visit the originating site.
NewsGator only shows what's new, so you can learn instantly if there's new information without having to go to each site individually and look. It's a huge timesaver.
You aren't limited to searching for people. You can search for subjects, such as "air pollution" or "horse racing" or "Kentucky" or something much more specific, such as the name of a particular drug. Obviously how good your results are depends on which words you choose.
This form of serving content on the Web is expanding rapidly. The latest form is called "podcasting," which uses RSS and aggregators to download recordings to your iPod or other audio player. The New York Times just had a front page story on this new form of radio, in which you can find people talking about any subject you can imagine.