It is obvious that taking a Dog Obedience class would be the best solution. But as someone said above, going to a class takes time and costs money. A good Dog Training center is also not always available close to where you live.
It is why some other resources are made available like magazines, books and DVDs to learn things. To learn cooking for example, you may go to a class and learn the ropes or purchase a recipe book, watch a TV cooking show or a DVD.
To answer the question, I would recommend to visit the Bad dog training tricks blog and get their free email dog training course and see if their DVD is the one you need.