What are good ways to prevent bronchitis?

Acute or chronic? Acute bronchitis is caused by an infection so stay away from anyone who is ill as much as possible and wash your hands often as the microorganisms causing the illness are often carried on your hands. Chronic bronchitis, a form of copd, is usually caused by smoking so avoid smoking to prevent this disease, including quitting if you are smoking.
Lifestyle! Good clean living goes a long way towards preventing all types of illnesses. Avoid junk food of all types, artificial sweeteners, and get some exercise. If you want to add some insurance during the cold season, adding vitamin c, echinacea, and other agents can be helpful.
Anti-inflammatories. Most cases of acute bronchitis are caused by the same virus as causes cold. The virus is not making any poison to cause your symptoms of colds, rather the virus is just taking a vacation in your body. The symptoms come when your body sends inflammation to the area to fight it. Take medication to such as ibuprophen to decrease the inflammation and the symptoms improve before bronchitis sets in.
Avoid cigarettes. Do not smoke--this will reduce your risk of lung disease, increasing the risk of bronchitis. Avoid sick contacts, wash your hands frequently, eat well, and exercise. All the typical things your doctor keeps telling you.