1. Connect the (+) cable to the (+) terminal of the dead battery.
2. Connect the tip of the same cable to the (+) terminal of the new battery.
3. Connect the other cable (earth cable) to the (-) terminal of the new battery.
4. Finally, connect the earth cable to the engine block or chassis of the dead car -
....as far away from the dead battery as possible.
5. Start the engine and then remove the cables in the reverse order in which they were.
... connected.
 
Always protect your eyes and hands from the battery.
Do not attempt to jumpstart a damaged battery.
Do not touch the car and make sure that the ignition of both cars is turned off.