Braking
The best method of braking depends very much on whether you have ABS brakes or not. ABS is an electronic braking system which rapidly pulses your brakes on and off in the event of a skid. It is available as standard in many cars these days. You'll know when the ABS comes into operation because it produces a very loud rumbling noise and a strong vibration can be felt through the brake pedal. It is worth your while trying out your ABS brakes when you are not in the middle of an emergency, so that you know what they sound and feel like; many people are frightened by the sensation and take their foot off the brake.
If you need to stop very quickly and you have ABS brakes, the way to do it is to jam your foot on the brake and leave it there. Don't let up, don't pump the brakes. Keep your foot down hard until the car stops.
If you have not got ABS brakes and you want to stop suddenly, the best way is to pump the brakes: this involves pushing your foot onto the brake pedal, releasing it, pushing again, releasing and so on. This will stop your car in the shortest possible time.