In order to be successful at professional networking, one should utilize multiple sources to network. These sources can be LinkedIn, Facebook, Twitter, and other online resources. The sources also should be in person. By attending conventions and seminars, networking can be taken to a more personal level. It is easy to read about some on their site, but it is hard to get a personal feel for them. Some tips for networking successfully in person: always be nice and friendly, do not talk too much about yourself and provide so much information (that's what your sites help you do), learn a good hand shake, take business cards to pass out that includes your LinkedIn or other sites, dress nice, and be controlled when in a more social environment. Add new friends to your twitter or LinkedIn to stay in touch. I believe having a good blend of person-to-person networking with technological networking will create more success.