If there are kids, you need a plan for them while you are separated. Who will live where? Who pays for what domicile?
Be sure you know where all your finances are and how to handle them. You will need to have separate finances apart, right?
If you intend to try to stay together, then you need to iron out whatever differences are causing your desire to separate, preferably with a counselor.
If divorce is the only answer, I recommend and equitable split without some of the "dirty tricks" that go on. That is easiest and fairest.