Mas safe and proper jud ang "engine brake". Using clutch while braking is applicable only when you are driving at speeds below 20kph, in which braking while the gear is engaged will cause the engine to die at these speeds. When you are traveling at 40kph up (usually 2nd Gear and up), using clutch while braking is unsafe because you are only relying to the power of your brake in reducing your speed or putting your car to stop. This will cause your clutch lining and your brake pads to wear out fast.
The importance of "Engine Brake"
Engine braking is a way to use the deceleration offered by your engine when the accelerator is depressed. Yes, your accelerator can also function as a decelerator. When you step on it you get your acceleration, when you depress it, you will have indeed you deceleration. And the amount of deceleration varies also proportionally with your gears, the lower the gear ratio, the higher amount of deceleration you will achieve. You can even use this to decelerate gradually by releasing the "accelerator pedal" gradually. With this knowledge and skill you can learn how to drive smoothly at speeds 120kph to 180kph at express ways. Or you can learn how to drive 80kph to 100kph at city streets with extreme acceleration and deceleration but not recommended.
Here are some additional driving tips:
1. Change gear only at 2500 to 3000RPM.
Under Rev - will cause your gearbox to wear faster.
Over Rev - is not good for your engine and a waste of fuel.
2. When overtaking, if you are running at speeds below 2000RPM, it is recommended to shift to the next lower gear to attain 2500RPM and accelerate up 3000RPM. Change to the next higher gear only after your car has completely passed the other car. This will reduce the amount of time you spend in passing the other car will offer you a safe overtaking habits. Passing with RPM below 2000RPM is very unsafe (you can do this when passing slow moving vehicles but it is not recommended) this will increase the amount of time you spend on the opposite lane.