The two most important things that are necessary to prevent a mouse infestation in your home or business are:
Cleanliness – by making sure to practice good sanitation, especially in eating areas, it is less likely that mice will be attracted to your home. Mice usually look for places where they can easily hide and where they have easy access to food. Cleaning up any clutter in your home, cleaning up after eating and storing food in glass or metal airtight containers should make your home less attractive to them.
Block entry points – the best way to prevent mice from entering your home or business is to seal any potential entry point. Mice can squeeze through holes as small ¼ inch in diameter so this will require inspecting the outside of your home and blocking any holes larger than this. To block these holes, first stuff them with steel wool and finish by plugging them with a hard material. This way, even if mice break through the barrier they won’t be able to gnaw through the steel wool. You can purchase steel wool at your local home hardware store.