To develop a broad network of employment informants, spend some time making a register of the people who may be able to help you. Draw up separate lists for relatives, friends, classmates or teachers, former co-workers, and so on. In the case of casual acquaintance, try to remember the people you had the most contact with, and what the contact was. When you contact possible informants, make your approach personal. Many people will go out of their way to do a favor for a former friend who still remembers them.
Newspapers offer other kinds of clues to unadvertised job openings.
For example, special features in the news often describe new products, personnel changes, retirements, or business expansions. Even marriage announcements and notices of military inductions can indicate that a worker is about to move out of you area, leaving a job open. Contact the employer before he or she advertises a vacancy. Most jobs are filled within a few days so don't delay. Contact employers right away.