TIP #1: HARNESS THE ENERGY
We know that choke or prong collars can cause injury to a dog, but so can a regular flat collar if your dog is a puller or who periodically lunges at squirrels, rabbits, etc. Of course we want to teach him to walk nicely on a leash, and using a harness during the training process will eliminate the potential for injury.
TIP #2: SMALL CHANGE MEANS BIG DIVIDENDS
When teaching a behavior watch for even the slightest changes in your dog and reinforce them. This encourages your dog to learn and problem solve!
Jeff Dentler, CPDT-KA, CTDI