Safari 6, the web browser that comes with OS X Mountain Lion, added a ton of new features when it launched a while back, and Reading List is one of the cool ones. Reading List will let you save articles without having to bookmark them, thus avoiding all the hassles of organizing and/or synchronizing bookmarks. It’s a similar system to something like Instapaper or Pocket (formerly) Read It Later, but baked right in to your Safari browser.
Make Better Use Of Your Time With Reading Lists In Mountain Lion And Safari 6 [OS X Tips]