These are a few examples of social media sites that I use on a daily basis.
Twitter is currently the most exciting micro blogging platform (but don't let yourself be fooled by this description, you'll have to experience it yourself). facebook is a great platform to hook up with your friends. YouTube and vimeo are two great services that let you share video. flickr is the platform that revolutionized online photo sharing and without skype and its free international internet phone calls, a lot of today's connected internet wouldn't have happened the way it did.