If your network contacts are only one layer deep, you are missing an excellent opportunity to expand your network exponentially. How? By using the same method as successful network marketing—don't just sell your product, sell others on selling your product. Simply put, instead of just updating your contacts as to your situation, ask them to pass on the information to anyone else they feel could help you. You continue to chain from one contact to another as your network continues to expand.
It's not about who you know. It's who they know.
As you regularly keep in touch with your contacts, ask them if there are other people you should be contacting. When they inform you of these people, give them a call directly. This will then include second- and third-level contacts as direct first-line contacts. When you contact next-level contacts, send them five copies of your resume and ask them to pass your resume along to those who may be able to help you further in your job search. Let them know that you will be getting back in touch with them after a week or two, then contact them to gather in the names of the people to whom they have passed your resume. Start the process over again with each new person and you will have a nearly continuously expanding network of potential contacts. Following this simple chaining technique will grow your network far beyond your immediate circle of contacts.