You can effectively use Peppermint oil to repel Mice from your home and other areas. Simply place a drop of two on a cotton ball and place in the area you wish to clear. Combine with spearmint oil for a particularly effective blend. The scent is so strong the mice cannot stand it and will (theoretically) run away from the smell.
Be careful not to use too much or you may harm the mice if they ingest it. Be very careful using any neat essential oil if you have children or pets around.