To avoid colds and flu that often bring on sore throats, stay away from people with upper respiratory infections, wash your hands frequently and keep hands away from your eyes and face, eat a healthy diet, get plenty of rest, and drink lots of fluid to help your body ward off disease.
One cause of sore throat, especially in the winter, is influenza virus. The CDC recommends that everyone older than 6 months get a flu vaccine to prevent this infection every year.
If you suffer from seasonal or year-round allergies you may be prone to more frequent sore throats. Gastroesophageal reflux (GERD) may also make you susceptible to frequent sore throats. Proper treatment for these ailments can usually reduce the frequency of sore throats, so talk to your doctor.