Each RSS reader has a different look and feel, which affects everything from their interface to how they notify you about about new content. Take a few minutes to try some different readers before settling on one to use.
Once you have decided which to use, you can subscribe to RSS feeds from journals, news sites, or blogs that you check regularly that use the technology. When you subscribe to a feed, your reader will file that information away and notify you when new content has been posted.
Some links below direct you to search in a database. Most databases work the same: type in your keywords, then narrow your search using the toolbar provided. Make sure to focus your search by publication date for the newest content.