The first thing I go over with my clients is the crate. Why? Because it's so important!
Dogs are den animals so it is very natural for them to have an area that imitates a den. It should be tight, cozy, and quiet for the dog to rest in. The crate should not be big enough for the dog to spin in circles or jump around in. Dogs also naturally keep their dens clean so they will learn to not go to the bathroom inside the crate.
Encouraging your dog to go in the crate for naps and during the night is vital when first getting a dog. When crate time is not demanded, most dogs will get into a lot of trouble around the house, such as destruction inside the home, excessive barking, play biting, running around the house, and more! Dogs get over stimulated when they are not rested which result in these bad behaviors.
Side note: dogs should sleep ~18 hours a day
The crate should never be used as a source of punishment. We want dogs to associate their crate positively and view it as their "safe place." Teaching a dog to be comfortable and calm inside a crate is important because they will eventually be exposed to being inside a crate, whether it is at the vet or groomers and you do not want them to be anxious or nervous in those situations.
So, do not be nervous or afraid to get a crate for your dog. Guide them to be calm and rested through a consistent schedule of crate time. Also, make sure that you are fulfilling your dog's needs when they are not in the crate through mental and physical exercise.
Key To Happy Dogs