This is really an interesting topic which I feel like talking about.
I have started my driving life in hills itself.Its fun to drive on hills at night.I should say that drivers who learn driving in hills and drivers who know how to drive perfectly on hills,can drive on any terrain in the world, because hill/slope/inclined road surface are the toughest terrain to drive,I believe.
I will not say that I am a veteran hilly driver but I would like to give a brief verbal crash course of the same.
HILLSIDE/SLOPE/INCLINED TERRAIN DRIVING TECHNIQUE :-
Suppose you are about to drive a 4-wheeler(any) uphill on a hillside road(which is say 65 degree inclined).
First you apply the foot brake then release the handbrake.Get the gear lever to neutral position,then start the engine with the foot brakes applied.Your left foot should be on the clutch,totally pressed down engaging it and your right toe should be on the brake and right ankle should be on the accelerator, i.e. in a diagonal way.To rev the engine you just press your right ankle as required while continuously keeping your right toe pressed down the brake pedal,engaging it totally.
Now engage your gear by moving the lever to 1st gear,without disturbing the above mentioned setup of all pedals.Now press the right ankle little bit on the accelerator,revving the engine,then slowly release your left foot releasing the clutch(dont do it fast),give attention to the engine sound,you will notice that the engine sound changes as it gets engaged to the gear and the rpm decreases a bit,at that very moment start releasing the right toe which releases the brake gradually and dont release the accelerator from its previous position.Now the vehicle starts moving gradually, you keep on releasing the clutch(left foot) and the brake(right toe) and press the accelerator(right ankle) a bit so that the engine dont stop and move the vehicle in the uphill direction.
As soon as you have released the clutch(left foot) and brake(right toe) totally, rest the left foot on the floor and twist the right foot ,turning the right toe from the brake to the accelerator pedal totally resting the right foot on the accelerator and pressing it as desired, to move the vehicle in a desired speed.
This way you can drive any vehicle on hillside/slope roads of any degree of inclination.
Dont try to drive on inclined terrains/roads with combining handbrakes other than footbrakes.Its dangerous.Suppose you are using handbrakes other than footbrakes in all the procedure I have mentioned above,Then the brakes will be applied only on the rear wheels and not on the 4 wheels equally, so when you are releasing your clutch and pressing your accelerator and at the same time combining handbrakes,then if by-chance your clutch is released earlier to the handbrake-release, then the front wheels will start rolling and as the rear wheels are not moving due to brakes then the vehicle will turn sidewards and the % of its turn will depend how fast is your front wheels rolling.This situation is very dangerous in hillside driving and traffic condition.
There is another danger in using handbrake, when you use it your left hand will be on the handbrake and only your right hand will control the steering, so if the above situation(danger) occurs it will take time to leave the handbrake and hold the steering.
So I request all, infact I insist all not to use handbrake at any cost in Hillside driving.Only use footbrakes.
While driving downhill direction, drive only in 1st or 2nd gear, so that you can control your vehicle in emergency situation.Utmost you can drive in 3rd gear but in rare situations only.
Always give way to uphill traffic if you are moving downhill either it is night or day.Its a rule in Hillside driving.