When I find interesting articles or news items, I save them. Back in the day, I'd snip articles from newspapers and magazines (if they were my own!) or make photocopies. I had a huge mess of papers - important (or just interesting) articles and tidbits that I may not ever need, but didn't want to lose.
These days, there are better ways to go about it. If I find an interesting article online, I look for "ShareThis," "Bookmark," or an email button so I can send the article to myself. The ShareThis button - used on this site and many others - has a ton of options, so you can email or post to your Facebook, Twitter, delicious or just about any other account you can think of. In the catalog, it's called "Bookmark" and has similar options.