Crate training is a vital tool that can help you to put an end to other bad behaviors your dog may be exhibiting. Here are some important reminders: remove all collars and harnesses, provide water for your dog, let your dog go to the bathroom before you leave, and lastly if your puppy is exceptionally young and has not been properly potty trained yet it is best to leave him in an open pen with paper so as not to soil inside the kennel.