• Operate generators outdoors, in an area with good ventilation. Never run a generator in a home or garage due to their carbon monoxide emissions.
• Do not plug your generator into a wall. This causes feedback. Use heavy-duty extension cords to connect appliances to the outlets on the generator.
• Turn the generator on before plugging any appliances to it. Once the generator is on, turn equipment on one at a time. Prioritize your needs.
• Do not operate the generator in wet conditions. Be sure that the unit is off when refueling. Keep children and pets away from the portable generator.
Original source can be found here.