if you are keeping your pup outside most of the time then build a carte, dog-house ect out of wood but if your dog is inside i still sujest getting a plastic one from the pet store or try looking in the local adds or at flee markets to get a good deal. with wood lots of dogs will try to chew them and this can be a problem not only with creating bad habits with chewing wood but getting slivers in their mouths
a plastic crate inside would be a lot cleaner and they are really easy to clean and can be disassembled to clean or store if needed. also, if you are going on a road trip , need to take them to the vet or where ever or camping you can't really pack around a wooden crate in the car; a plastic one is much more practical. Plus they are very sturdy and practically indestructable.
I agee with mellissa about kepping them in the crate at night. that's what we did so our pup didn't get into trouble
alos, that's how we house trained her. yuo can get information about kennel trianing on the internet.