The old saying "its not what you know, its who you know" is just as relevant today as it ever was. It is therefore essential to network with the right people. Ask trusted friends and associates, but make sure, if necessary, they exercise discretion.
Networking with the right Recruitment Consultants can be as good, if not better than knowing people yourself. Alternatively, if you have time, you could always research the market yourself with the help of directories or on-line company lists and contact companies directly.