Keep your home clean. Wipe off your countertop. Don't leave crumbs and other food bits out for the mice. The main reason they're in your home is for the food.
Put breakfast cereal, pastas, dog and cat foods in plastic air-tight containers.
Find the entry points and stuff them with steal wool. Mice can’t chew steel wool.
Pour a few drops of peppermint oil on cotton balls and place these in areas where you think mice may frequent. Mice have very sensitive noses and the peppermint oil in a bit overwhelming for them.