I spent 12 years as a tool in a financial parental war, but I really don't have any tips... I think, looking back, that I didn't really handle it well.
Just don't do what I did... Don't become a messenger when they argue about shit... It gets you more involved than you should be.
I don't know what your musical style is, but you can always groove to this shit, and beat the shit out of a pillow or something. It doesn't really help, but it takes the edge off things a bit.
My parent's have been separate all my life, I live with my dad, step mom and half brother, and visit my mom, brother, step dad, and half brother on weekends, It sounds like a f'cked up situation but it's actually not that bad.
My parents got a divorce a year ago. Pretty bad at first, but you get used to it after a few weeks. At least, I did.
Anyways, my advice is to just deal with it. Not being rude, I'm serious. The more you try to stop it, the more it ends up bothering you. Just deal with the Divorce, and it's alot less painful.