In networking, as in most aspects of life, the more you give, the more you get back.

In practice, this means giving as much to your network contacts as you give to your ideal clients. Give them information that will help them improve their personal and business lives. And introduce them individually and collectively to others with whom they can develop mutually beneficial relationships.

In helping your network contacts, you are enhancing your relationships with them. Invariably the return on the investment in enhancing relationships is increased help and support coming back to you.
To learn more about maintaining a network of personal contacts, see: Your Personal Network Is Your Extended Support Team