My dogs hair is really matted- what is a good way to get the matts out and keep them out?

you call and make an appointment at a professional groomer, tell the groomer the dogs condition so they can allow enough time ... you can not get it out on your own without serious discomfort to your dog ... after the dog has been shaved, brush him regularly to avoid his coat becoming matted ... you might slap yourself for allowing your poor dog to get in this condition ...