RSS and Feed Readers

Either I don't really monitor any websites or I don't exactly understand RSS and Feed Readers. I've added several feeds to my account, the most interesting to me so far being the "Collection Developments @ Sno-Isle" feed so I can stay on top of new titles quicker and easier, but the other ones I'm most interested in are cartoons, jokes, and daily horoscopes! I plan to pay more attention to websites that I visit to see if there are more feeds I can add that will be of real use to me. I'm guessing that the more I use it, the more useful it will become since I will/should understand it better. As far as libraries taking advantage of this technology, I suppose that similar to me and the "Collection Developments" feed, libraries could perhaps use feeds to publishers websites to see when new books are being published? Or maybe keep track of news stories pertaining to libraries? I'm going to go play with my feeds a little more and see if I can come up with any more, then I'm moving on to the next thing.......