I will never train another dog without a prong collar and an E-collar. My 19 pound pound puppy got a prong collar and my vet thanked me for loving my dog enough to treat her like a dog and keep her under control.
I highly recommend Michael Ellis videos, available through leerburg. The Leash Pressure video is particularly useful. Our Schutzhund/ring sport club training director and State Canine Master Instructor/SME recommends the videos highly.
The leash pressure video, when used in conjunction with "the power of training your dogs with food" and "the power of playing tug with your dog" teaches your dog that the leash/slip collar/prong collar are not just for corrections, but can be used to let the dog know that you are trying to communicate with it. The e-collar videos are also pretty good.
Ellis is like a 90-95% positive trainer, with corrections for willful disobedience.
pat