If you find your temperature gauge creeping into the red, turn on your heater. Sound crazy? It can work.
Your heater pulls heat from the liquid that cools your engine. If you turn on the heater and set the fan to the highest blower speed position, your heater will pull more heat from this liquid, helping it to cool down the engine faster. Also be sure to turn off the air conditioner at the first signs of overheating. Doing so will take a load off your engine.
The best thing you can do, however, when your engine overheats, is to pull over as safely and quickly as possible and wait for your vehicle to cool down. Never attempt to take the radiator cap off since it is keeping boiling, high-pressure liquid in check.