Twitter

Twitter is an excellent tool to communicate with people that know about things you are interested in, things you need to find out and news.  In fact, the news you receive is so current, the event is just took place! For example, when the Iran Riot occured last year, Iranians were tweeting about the events. This made the rest of the world find out the occurrences at the time they were happening. This, of course, put traditional news media to shame :)