Fill a pot of water on your stovetop and set the stove's dial to medium-high heat. As the water begins to boil, it evaporates into the air, which increases humidity in your home.
Place a portable humidifier in each room that has hardwood flooring. Fill the warm-air humidifier with water, and set it to a low setting. A low setting allows the humidifier to improve the room's moisture, and does not use the water's tank as quickly as the high setting.
Add a humidifier to your furnace. A professional technician installs the humidifier to your furnace, which evenly distributes moisture to all of the heated rooms.
Purchase a humidity gauge for your home. A humidity gauge monitors your home's humidity level, and will warn you if your home's humidity level dips below the necessary moisture level to prevent separating.