A lot of things have changed in the world, but one that hasn’t is that the people you know can help you find that next opportunity. In fact, the vast majority of positions are filled via networking.
Job Search and Career Networking Tips lots of good general advice. Networking is about helping each other.
What Does ‘Networking’ Really Mean? good article explaining how to network and what it means to network.
The Trouble With LinkedIn: Bigger is not better talks about LinkedIn specifically, but the bottom line is that it is quality not quantity in your network.