Today there are different techniques of using jumper cables for different cars. So, it is better to read the manuals of the car properly before starting the use of jumper cable. It is always better to follow the steps mentioned in the manuals for jump starting the dead car battery.
But of course there are some essential steps that you should take care of while jump-starting the car. Make sure that the two cars do not touch each other while they are standing in front of each other. Also make sure that both the cars are in parking brake mode.
The most important is the connecting of the jumper cables to both the cars. You need to first attach the red colored clamp or the positive clamp to the positive terminal of the active battery and then the other positive clamp to the dead battery. Again, you need to connect the black colored negative clamp to the negative terminal of the active battery and the second black colored clamp has to be attached to the screw that you find over the engine of the dead battery.
Now you need wait for some time and then after some time start the car with the dead battery. As the car starts, the jumper cables need to be removed. Again while removing the jumper cables; you need to follow the reverse method that is first you have to remove the negative clamps and then the positive clamps.