TIP #1: THE OPPOSITION REFLEX
Ever notice when your dog pulls on leash, and you pull back, that makes him pull even more? That's called the Opposition Reflex (the same reflexive behavior also happens when you push). To break that cycle of tug-o-war simply stop moving when the leash gets tight and wait for some slack in the leash. When that happens, click and offer a treat by your side. When he comes back to get it you can then continue on your walk.
TIP #2: DITCH THE BOWL
When we have 20+ inches of snow on the ground it is more important than ever to make sure our dogs' minds are mentally stimulated. To make that stuffed bone or Kong last even longer, and to challenge your dog's brain even more, prepare her meal the night before and pop it in the freezer. Quoting Dr. Ian Dunbar, "Mental exercise tires a dog physically more than physical exercise does."
Jeff Dentler, CPDT-KA, IAABC-ADT, FFCP, CTDI