What's the best way to get a dog to lead

I don't know if it'll work for grown dogs, but with hard headed pups that don't want to walk, I get a long piece of rope or string and tie it to their collar. Then I get another dog that will lead and go for a walk. When the hard head stops just keeping walking with the other dog. And don't pay attention to the one that stopped eventually when you get far enough away and he realizes the "pack" isn't stopping for his shenanigans, instincts should kick in and he should come running to catch up with the pack. After a couple Times he should be ok.

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