Buy a good humidifier and use it when the air is dry. You might use if year round in a dry, arid climate. If you live in a humid climate, you might only need to use it in the winter when your heater is on, pumping out dry, hot air which quickly dries out skin.
If you have eczema occasionally, an outbreak may be related to other things that cause allergies. Try not to use household chemicals that are known to irritate the skin. You should pay attention to if you get outbreaks after using any products in particular.