What is the safe method for jump-starting a vehicle with a dead battery?

1. Connect the positive terminal to the negative terminal of the same battery.
2. Connect positive to positive, and negative of the booster battery to a clean metal grounding point on the engine block of the dead car.
3. Connect the positive terminal of one vehicle to the negative terminal of the other, and the negative terminal to the positive terminal, in a crossed pattern.
4. Keep the ignition of both vehicles turned off while cranking.