Linkedin

http://linkedin.com/ is the world's largest professional network with over 80 million members and growing rapidly.  LinkedIn connects to your trusted contacts and helps you exchange knowledge, ideas, and opportunities with a broader network of professionals.  LinkedIn gives you the keys to controlling your online identity.  Have you Googled yourself lately?  You never know what may come up.  LinkedIn profile rise to the tope of search results, letting you control the first impression people get when serching for you online.  I enjoyed usinge LindedIn, it was very useful and helpful in locating coworker, friends and family.  I could also invite people to join.