Listening

One of the best networking hacks in the world.

People with knowledge tend to hold back what they know under the presumption that you aren't really interested in what they have to say. But if you listen and show not only your interest but your appreciation, they will share. They will share everything they know, and then some. So not only is this a learning opportunity for you, but it becomes one of the fastest ways to make friends and build an incredible network.