How do you...

u should behave really good I mean at least 4 a week u need really good grades, help at trang chủ with the chores. . . and Ur mom in anything she asks. . . listen to her and also to UR dad . . . basically try to be hoặc at least ACT like the PERCECT SON hoặc DAUGHTER but it's better if u do that for thêm thatn a week otherwise they will realise that it's 'cuz u want something. . so don't overact!!! and don't go too far!!!!

I think bạn should get high grades, be a good daughter/son, do chores something like that.
It will be a great achievement that your parents will allow bạn to have a party. Do what they like first. Then maybe they will give bạn your salary which is a party. Ask them...=)