It is good to know where your spare tire and tools are located, and that they are in good order; the spare tire and tools required are usually stored in the trunk, however on a larger car or truck a spare may be bolted underneath the vehicle or onto the trunk. Get out the jack, tire iron, and crankshaft (refer to picture 3 here for tool images), but the spare can stay for now if you want.
It is very important to loosen the bolts holding the tire in place before raising the car off the ground, otherwise you may not be able to produce enough torque to loosen the bolts, especially old rusty ones, and you certainly don’t want to knock the car off of the jack. Only loosen the bolts a little bit right now though, this way the tire will safely stay in place.
Once the bolts are initially loosened, place the jack underneath the car. Only the manufacturer provided jack should be used; the use of a different jack could compromise safety. A small arrow or notch will be shown on the pinch wall of the car's frame under the car near each tire; this is where the jack should be lined up with and placed.