The slow, steady use of a network.
1. Create a list of the cities, industries and companies you are interested in.
2. Every day, ask a different friend if she knows anyone in any of those companies, industries or cities whom you might speak to.
3. Call your new contact, tell her what you're after and ask if she knows anyone you should speak to who might help you.
4. If she doesn't, ask for a referral to someone who might know someone.
This is beyond most people. They know that their friends are not eager to sic a job-hunter on their acquaintances. And, they dread the idea of putting those friends on the spot.