Rule n° 1

Make a shopping list before you go and stick to it !  Think about the meals you’ll be eating that week, or if you’re stocking up on basics, have an idea of what you need.  A few  wholesome store-cupboard staples: wholegrain rice and pasta, soups, spices, herbs.  From the cold aisles, go for low-fat minced meat, lean chicken breasts, fish, smoked salmon, frozen vegetables, fat-free yoghurts, semi-skinned milk, eggs and of course plenty of fresh fruit and vegetables.