Before you groom your dog for any show, be sure you understand your dog's breed and what they typically look like and what show dogs, in particular, should look like within in the breed. The show judges will judge not only based on your dog’s skills but on how well your dog shows and is cared for.
To meet the requirements of a show judge, you will need to understand what typical show dogs look like. Be sure you start this grooming process early, well in advance of the show, so any issues have been tackled long before the show. If you need to cut out huge knots or mats, you want to give those time to grow out. Also, if this happens to be your first show, you'll need time for any mistakes to be handled.
If your dog is a fabulous show dog, then he probably knows this routine already. However, if this is your dog's first show, he may be a little anxious while trying to understand why you are suddenly poking and prodding at him so often. Before you begin a show dog’s grooming process, get in the habit of brushing him every day. Touch him, look in his ears, spread his paws, so he's used to being handled in such a way before you begin to groom him for the big show.
If you want to create the perfect Best in Show dog, do your research and know what you're doing long before the show. Practice on your dog well in advance so your dog not only looks like Top Dog but wins Best in Show as well.