Really Simple Sindication.
It's a way of content coming to you, rather than you going to the content.
Basically you get yourself an RSS aggregator/reader program. I use sharpreader. Or you can sign up to a couple of websites that can do the job for you too, but I forget their names. Then you add to it subscriptions to these "RSS Feeds". Every X minutes the program goes and downloads the RSS file which contains a number of entries, be they forum posts, news stories anything really. A program like sharpreader will popup and tell you there's new things for you to read.
I'm subscribed to things like the BBC News, some car news websites, games news, tech and gadget news, anything at all that takes my fancy. I'm subscribed to close to 50 feeds I think. So instead of me visiting 50 websites regularly to see if there's anything to read these 50 websites come to me!
More info - http://en.wikipedia.org/wiki/RSS_%28file_format%29