Seal up cracks and crevices around the house to prevent them from overwintering in the home.
The best thing you can do is monitor your veg patches. Check beneath stones, leaves and deadwood to see if they are taking cover during the day. Squash them as and when you see them.
Likewise, clusters of tiny white eggs are laid beneath the leaves of plants, so should be wiped off whenever seen.
Keep veg patches of areas containing desirable plants clear of debris and weeds.
Attempt planting strips of 'trap plants'. The idea is, these will lure in pests and keep them away from desirable plants. Suggested ones are Sweet corn, Okra, Mustard, Sunflower or Amaranth.
Neem oil, Insecticidal soap or Pyrethrins may be the next plan of action. Always assess the severity of an infestation beforehand. Take care not to spray any plants which are in flower.