Socialisation and training
A well-trained dog is a pleasure to have around, and begin training as early as you can. It is possible to teach an older dog, but it is better to start when your dog is as young as possible. Start off with simple tasks, such as getting your dog to respond to its name. Then graduate to training around the house and in the garden using the lead. Training before a meal is a good time, as you are sure your dog will pay you full attention! The training periods should be short, about 15 minutes per session. Reinforce 'good' behaviour with a treat which can be gradually replaced with praise alone. Unacceptable behaviour should be corrected with a sharp 'no'.
Exercise
The amount of exercise needed varies according to the age and breed of a dog. A small lapdog may need less exercise than an active hound. However, each dog has its own exercise needs, and as age creeps on it may prefer a more sedentary life. A responsible owner will still make sure his/her dog's life is enjoyable, with exercise perhaps replaced by toys for mental stimulation.
Remember, as well, to follow any veterinary advice you have been given about exercise. For example, a dog after surgery will need to be rested, especially if it has had an orthopaedic operation.