As a former vet tech, I have to disagree that tail docking is cruel and unnecessary. Many of you may see it as an amputation, but it's not. It's done when they're only a few days old, and the bone is very soft, similar to cartilage.
Many of the posters on this thread have expressed concern that tail docking is cruel, and if done properly, I can assure you it's not. Docking is carried out when puppies are tiny. Their eyes are not yet open and if carried out correctly, the procedure causes no pain or discomfort. Indeed, some puppies which are docked whilst they are asleep, do not even wake up. After docking, puppies will immediately return to their dam to feed, and there is no evidence that development or weight gain is in any way arrested by the docking procedure.
There is also increasing tail related injuries in countries where tail docking is banned. Injuries can be so severe that the dog must have their tail amputated. Which is horribly painful for the dog. For instance, working gundog breeds have to hunt game through heavy vegetation and thick brambles, where their fast tail action can easily lead to torn and bleeding tails which are painful and extremely difficult to treat. Docking the end of the tail eliminates the risk of injury.
Another good example is Boxers, which have an enthusiastic tail action, are also liable to damage their tails, even in the home. All boxers whip their tail around very fast when they get excited, and if their tail were to hit something, it can cause the tip to bleed or even break. I have personally assisted in quite a few tail amputations on boxers, and it's incredibly painful for them even with pain medication. They could have avoided such a painful injury with a simple tail docking a few days after birth.
As far as ear cropping is concerned, I personally don't think it's necessary, but if it's going to be done please do your research, interview vets, and ask for pictures of procedures they've done before. Whatever you do, don't go blindly into just any veterinary clinic and expect great results, or you might just wind up with a dog with butchered ears for life.