The Midwest iCrate with Divider is ideal if you have a puppy--it comes with a divider to assist in crate training. The Halti Headcollar, suggested by trainer extraordinaire Matt Beisner of THE ZEN DOG, changed Chance's walking game. Pair the PetSafe Clik-R with Zuke's Mini Naturals for effective and fun clicker training. I don't leave the house without Pet Corrector spray to protect Chance from uncontrolled (and uninvited) advances from strange dogs. A Thundershirt has helped a lot of dogs with a wide array of anxiety issues. The tall Evenflo Baby Gate is what I use to contain Chance in the kitchen while I'm out of the house; toss in a Kong Wobbler when you leave to ease separation anxiety by giving your pup something to occupy himself. And I've read all of these books and recommend them all for different reasons--jump to Books if you want more specifics.