Social bookmarking sites give you a central repository to store links from the internet, wherever you are. You can apply tags and share these links with your friends, colleagues and anyone with similar interests.
If you come across an article on this site that is of particular interest to you, you can use the links below the article to save it for future reference.
All of the sites are free to use, but require registration. Once you have gone through the site's registration you can begin adding bookmarks.