How to control my bad temper?

My temper is real damn fucking bad man! How do i control it, practically i tried, but still failed
below r some of the incidents with my bad temper, really fell regretful with some n maybe srry for 1

my mum-omg, how could i just scream at my mum? maybe i wasn't happy wat she scold me but y have i just shout at my mum? Grrr...I cried in my room, real feeling bad

mr denis koh-lost my temper when he wanted confiscate something of mine. i shout into his face.

mr chong-again lost my temper, not once but four times this year.

traffic police-traffic police come kwai lan me n my brother. my bro. wan me go tuition on time so he drove past 2 red lights. 2 incensed when i saw we were tailgated by the traffic police. i got out of the car to push a traffic policeman. got off with a caution but will surely go prison if i do that again

mr ng chor yam-argued with him loudly at the front porch

immigration authorities- the singapore immigration authrotities apparently didn't allow my family to bring food like dumplings from malaysia. again just shout at them

a parent- well a taekwondo tournament, then after that i was working as an official. my job was to get ppl ready. then a parent felt unhappy that his daughter had to sit on the floor. so he come scold me, then i shout back at him. omg, i m working as an official. i shld be polite but i scold that parent. wats more, my bad temper also caused me to walk over n disqualify his daughter. the daughter cried lah, n i felt bad. srrry to the parent

my tkd trainees- really pissed me off when they dunno wat is left n rite. well they were like small boy small girl, i shout at them, then they scared of me, really felt bad. well, a person in the sch helped me anyway with how to teach left n right anyway.

my tkd instructor-wasn't happy with the way that he was so strict. i often go up against him that he quit the club, i blue belt that time. to this day, really felt bad n want to say srry to him

my nephew- well, only 3 yrs old, but u noe, he not very understanding wat. but again, i lost my temper n just proceed to smack him. he got nightmares for 3 nights consecutively. felt really damn bad

n the list of names still goes on.............

how do i control my temper, pls i dun want to go around shouting at people, n i dun want go jail, before i really do, please give me some advice, real real please, please dun hesitate to tag and give your advice here, thank you.