Why? Because you will get alot more out of the Internet if you do, as Seth Godin very well explains in his post: In defense of RSS. If you are looking for a feed to test it out on, may I recommend my own? It’s http://smartPeopleIKnow.wordpress.com/feed And while you are at it, add Seth’s too. You will be glad you did.
Indeed, for any blog on WordPress.com, you can get the feed for it by tacking on “/feed” to the end of the blog’s URL. Relatedly, most online news sources have lots of RSS feeds you can use. Once you start looking, you will see them everywhere.
And if you have a Gmail account, you can use http://reader.google.com as your RSS feed reader, though in truth, there are many such tools out there. Ask your friends and co-workers what they use and go with what you think will work best for you.
Smart People I Know 
I love Google Reader because I can quickly browse all my favorite sites, but sometimes I get carried away and subscribe to way more feeds than I can possibly read! There are so many interesting sites out there.
Ha! Yes, I have that problem too! Grouping them helps. But I try to be honest and say to myself that if I am not reading a site for months and months, then I should just delete it from my feed.
There is also an advanced thing you can do for that: I should blog about it!