There are a variety of training techniques offered. You must find the one that is most suitable for you and your boxer. Here are a few we suggest:
Clicker Training– is a method for training an animal using a clicker, or small mechanical noisemaker, as a marker for positive behavior. The method uses positive reinforcement – it is reward based. The clicker is used during the acquisition phase of training a new behavior, to allow the animal to rapidly identify that a behavior is sought and also the precise behavior of interest.
Obedience training – Obedience training ranges from very basic training, such as teaching the dog to reliably respond to basic commands such as “sit”, “down”, “come”, and “stay”, to high level competition within clubs such as the American Kennel Club and the Canadian Kennel Club, where additional commands, accuracy and performance are scored and judged. Obedience implies compliance with the direction or command given by the handler.
Gentle leader collars and leash – Gentle leaders can be used effectively to control unwanted behaviors ranging from leash pulling and lunging to barking, jumping, chasing, digging and begging.
There are several training classes you would also be able to take your boxer to.
Research on the training technique you are interested in and look for a local trainer
The main thing to remember with training your boxer is consistence and patience.