SOME USEFUL TIPS
Good housekeeping is essential with an infestation of mice in the home. Simple things like sweeping or vacuuming in dining areas, wiping off tables and counter tops, etc. ensures that there are no crumbs or leftovers available for mice.
Do not leave foodstuffs on counter tops over night; put bread in a sealed bread-bin, etc.
Holes in walls and around pipe work are an ideal point of entry for mice, so block them up with cement or filler.
If you come across any droppings in the house, keep a sample to show to the pest control technician. This makes identification of your infestation much easier. (But always wear gloves!)