8 ways to avoid getting sick this winter Drink plenty: Doctors recommend we drink about eight glasses of water a day to stay healthy. Keep it clean: Outside of the flu vaccine, nothing you do to keep colds and flu at bay is more effective than washing your hands. Sleep soundly: Sleep deprivation equals an increased chance of getting sick Have some Yoghurt everyday: Cold and flu viruses might have an Achilles' heel: Greek yogurt Load up on garlic: The same compound in garlic that wards off pests in the garden can help fight the flu and colds. Take vitamins and probiotics: Taking a daily multivitamin is especially important in the winter when we may be less likely to be eating enough fresh fruit and vegetables Exercise regularly: Staying in shape helps build up your immune system so it’s ready to fight off viruses during flu season.