How do you get your older sisters to be nice to you and to get you to be nice to your older sister?

You basically just answered your own question there :) .. I have an older sister and we always fight, but I noticed that when I am nice to her, she is nice back. I mean, I can't tell you how to be nice to your sister, besause I don't know her, but next time she's in a bad mood and snaps at you or something, ask her nicely if she's okay, something like that will do the trick (: .. good luck ! xxxxx