Cinnamon and cloves can be used as a natural deterrent for mice and bugs. As much as I don't have to worry much about mice or insect issues in our house I do like those spices that smell so delicious!
Using the leftover dough from your other project, roll into balls about the size of a nickle. Allow to dry overnight. Once dry, place into sachets. I had some leftover cotton ones, but you could use a handkerchief or a small square of fabric. Place in trouble spots in your house or where there are stale smelling drawers or closets.