If you haven't already, now is a good time to look around and see what needs to be put up or away. For example, it is not fair to expect your dog to ignore the smell of food items in an accessible trashcan. Nor is it fair to expect a puppy to ignore clothing, shoes or toys on the floor. These items need to be put away. Choose an area in your house for the crate.
Most people choose the living room, family room, or kitchen so their dog can be part of the family.
Now comes the fun part, teaching your dog to go into his crate on command. Use small treats, pieces of string cheese, chewy dog treats, whatever your dog likes to get him to go willingly into his crate with the door left open. If the dog is fearful or uncertain, start by putting the treats on the floor in front of the crate, then just inside, and when he's comfortable, all the way in back. Do this several times throughout the day until your dog is confident and comfortable with the crate. At this point, the door should remain open.