I actually do have a "secret" method: Datacenters. If you're a programmer/network/system guy there is no faster way to get lots of clients than meeting people in datacenters. They're the most qualified leads you'll ever find.
How do you find them? What do you do? Look up datacenter locations online and then go hang out there to see if you can hang out with a techie? Or are you talking about contacts you make through your job?
