Electrical system - make sure the battery is fully charged and the connections are clean. The alternator belt should be in good condition with proper tension. Exhaust system - make sure there are no exhaust leaks. All clamps and hangers should be snug. Check the oil - the owner's manual will identify the proper viscosity of oil for your car.
Improper oils can overload the starter motors or lead to bearing failure.
Checking the tires for air, sidewall wear and tread depth. Checking the air, fuel and emission filters, and the PCV valve. Ignition, wiring, hoses and fan belts. Changing and adjusting the spark plugs. Inspecting the distributor.