Using RSS Feeds
RSS (Really Simple Syndication) is a system that you can use to subscribe, for free, to a website in order to automatically receive updates.
Not all websites have RSS feeds, but it is a growing trend. This technology also extends to audio and video feeds called "podcasts" or "netcasts". Subscribing to these feeds will allow you to receive new audio or video from sites that offer them, as soon as they are released.
The whole idea behind RSS is that you don't have to visit each site you are interested in. You can let the new content come to you.
My blog, which is attached to this site, contains an RSS feed, so you don't have to visit to know when I post new content. So we'll walk through how to subscribe to ntxtech.com/blog, using Internet Explorer 7 and Firefox.
IE7
1. Navigate to the site; in this case ntxtech.com/blog. Near the top of the page, click Entries RSS.
2. The next window that opens will be the entire blog site. If you want to read the items in IE7, just click Subscribe to this Feed and then Subscribe in the next dialog box. You may need to change the Name of the subscription to something that you will know when you see it.
3. Click the Yellow Star 
(Favorites Center) to the left of the tabs, then select Feeds. The feed will be listed there, and will be updated every time a new post is added.
Firefox
1. Navigate to the site; in this case ntxtech.com/blog. Near the top of the page, click Entries RSS.
2. If you want to read the items in Firefox, select the location for the bookmark (the default Bookmarks Toolbar is ideal and very visible) , then click OK.
The feed will show up in your Bookmark Toolbar, and will be updated every time a new request is added. You can click on it, and the posts will show up in a dropdown list. You can click on any post title to read it.