Dealing with a joint custody arrangement can be hard for parents who do not get along well. The following tips may help in such circumstances:
1. Do not expect an unreasonable ex-spouse to act reasonably after separation. Keep your expectations in check;
2. Do not expect your ex to be friendly towards you after separation;
3. Diffuse the drama created by the ex by keeping your emotions in check; and,
4. Apprise yourself of your legal rights and obligations.
http://divorcedmoms.com/articles/5-tips-for-surviving-joint-custody-with-a-combative-ex–