Have a really good look around the exterior of your home for any cracks, crevices and gaps through which a pest could enter. Check for foundation cracks, missing roof tiles, gaps in fly screens and warped doors or windows. Repair rips or tears in screens, seal any openings with mesh and replace missing tiles or window stripping before any unwelcome guests move in.
Some cracks and gaps will be visible only from inside your home so take care to carefully go over the home internally as well. Check in, under and behind kitchen cabinets, refrigerators and stoves as well as between the floor around pipes and heating vents. Seal the gaps and keep those pesky pests at bay.