You can place either trap perpendicular or parallel to a wall or object. Since mice might not travel more than 20 feet in it's entire life, we recommend several trap placements. Commercial establishments would want to use the Tin Cat , Protecta MC, Mouse Master traps because of there larger capacity for holding the mice. The Tin Cats, Mouse Masters and Proteca MCs are suited for home owners. We recommend 2-4 traps per home, but it does depend on the population density.
Glue boards are also very effective.
Place the glue boards on their runways, paying attention to their droppings for correct placement. You shouldn't use glue boards in a dusty area and extreme hot or cold temperatures would reduce it's effectiveness. Many times a rat can get off the glue boards, but with mice it can quickly and safely reduce a population. These traps are very effective against rats and will also catch squirrels and chipmunks. Place the traps where you see evidence of activity.