If you are not sure which breed will best suit your lifestyle and your family, it's well worth doing your homework: after all, there are over 400 breeds to choose from!
Search the Internet: This is an excellent place to start, and there are dozens of websites dedicated to specific breeds of dogs. Some sites even offer quizzes to help you select the perfect breed for you.
Consider your family and lifestyle: If you have young children, you will want a sociable and even–tempered breed. If your family enjoys an outdoor lifestyle, you should consider a breed that will thrive on this and be part of your active life. On the other hand, if you prefer the quiet life, or have a small garden, consider a smaller breed that would be happier relaxing with you indoors.
It's also important to bear in mind how big your dog will be when he reaches adulthood; you've got room for the puppy right now, but what about later on? Also consider how much time you are willing to devote to grooming and brushing your pet, as some long-haired breeds may require daily maintenance.
Ask the right questions: Once you have a breed in mind, talk to people who already own the breed and ask them about their experiences specifically in the areas of training, aggression and health. A local vet will also be able to give you advice and let you know which breeds have a tendency to inherit certain health-related conditions. For example, large–breed dogs should have their hips checked for dysplasia; this is called hip scoring. Some breeds, for example Collies, Labradors and Irish Setters, should have specific eye tests. Some breeds should have blood tests for specific conditions, for example, von Willebrand's Disease in Dobermans.