A good idea for holes around cables and telephone wires is to stuff them with steel wool prior to repairing them. If a rodent chews on steel wool it will cause internal bleeding and kill them. Pay careful attention to garage doors. The weather stripping at the bottom is often improperly installed with gaps at the corners, or just worn out. This is often the first entry point.
Sanitation is also very important.
If you have mice all food products should be stored in containers that can be sealed. This is especially important in the garage. Often dog food or bird seed is stored in bags which mice can chew through. Kitchens need to be kept clean with no food products under sinks or ovens. This is especially important in commercial kitchens.