Here are some of the top tips from the CDC:
Install a battery-operated or battery back-up carbon monoxide detector in your home on each floor and near each sleeping area. Check or replace the battery when you change the time on your clocks each spring and fall. And replace your detector every five years.
Have your heating system, water heater, and any other gas-, oil-, or coal-burning appliances serviced by a qualified technician every year.
Have your chimney checked or cleaned every year. Chimneys can be blocked by debris, which can cause carbon monoxide to build up inside the home. And always make sure the fireplace vent is open before lighting a fire.
Never use a gas cooktop or oven to heat your home, and never burn charcoal or use a portable gas camp stove indoors.
Never use a generator inside your home, basement, or garage or less than 20 feet from any window, door, or vent.