How to avoid fighting?

Okay so im 15 and i effing wanna kill my parents,we argue all the time, i just hate who they are i wanna kick them in the head so much, and i know that my parents are gonna kick me out of the house once i turn 18, but i dont wanna get kicked out, my ma said if im nicer then theyll be happy for me to stay but right now they wanna stab me because i am such a brat, but ive been a brat for so long its just stuck on me, so how do i avoid fighting with them anymore