Power steering: Groaning noises or a rough feeling when you turn the wheel mean the system needs attention.
Spark plugs: If your car is approaching time for a tune-up, replace the spark plugs before the weather turns cold for improved starting.
PCV valve: (A pollution-control device on some cars usually in the valve cover.) Replace it at least as often as you do the spark plugs.
Hoses: Check for leaks, bulges or cracks and make sure clamps are secure. This includes air-intake hoses or ducts.
Battery: The terminals should be cleaned with a solution of baking soda and water. Make sure all connections are secure.
Cooling system: Check the protection using a hydrometer or test strips. Change as required. If low, add a 50/50 mixture of antifreeze and water to protect to 35 degrees below zero. If your cooling system has been neglected, you may want to flush it before installing fresh antifreeze.
Windshield washers: Keep your windshield-washer reservoir full using the premixed blue stuff or mix your own from concentrate.