Most people leave dog toys laying around the house. They then wonder why dogs steal shoes and other items we don't want them to and have a chomp on them!
This is an easy technique for keeping your dog interested in their toys.
Simply split the toys into two or more batches. Try and have a variety of textures in each pile, soft, hard, fabric, rubber etc.
Have one batch out for you dog to play with. When the week is up, swap them for the other set you've hidden away. This way it's like your dog has a new set of toy every week. Much more exciting than them just hanging around the whole time.