Many breeds have short hair and don't require regular clipping. However, if you have a shaggier breed of dog, he may require regular clipping as part of his health routine. Breeds that need regular coat trims include cocker spaniel, sheepdog, poodle, collie, Shih Tzu, Pekingese, and chow chow, among others. It's worth it to spend a little bit of extra money on a good pair of dog grooming clippers. A small investment up front will save you money down the road, since you won't have to pay professionals to groom your pet.  Make sure to use dog grooming blades that will give you the coat length you desire. Scissors will likely not give you a nice, even coat, and you may hurt the dog with them if he moves suddenly. Grooming clippers are recommended over scissors. You may have to go over your dog's coat a few times before you have a smooth, even cut. Don't rush it! Give your dog as many breaks as necessary, and make sure to move your clippers slowly. Brushing up against the coat then going the spot with clippers again help to get a smooth cut. Do will have to be done many times before you are done.
Decide if you need to clip your dog's coat. Use dog grooming clippers. Be patient.