Displaying a friendly, diplomatic, cooperative, pleasant, mature approach to your spouse during divorce negotiations (whether during your personal conversations or while under the guidance of a cooperative divorce lawyer) has many advantages:
There is little, if any harm, to your children or to the family unit. Dealing with your ex does not upset you or ruin your day. You are likely to feel free to ask your ex for a favor, and you are willing to do one for your ex. You have no need to obsess about the divorce and life in general starts to look good again.
You become able "let go" and think about other things. Your sense of humor returns, and your sleeping habits and job performance return to normal. Your conversations with friends and family no longer focus on the divorce.
In business, being nasty to a customer is unprofitable. Similarly, in dissolution of marriage matters, your soon-to-be ex is your customer, the one you must sell a settlement to. This is where it pays you to do what salespersons do and treat your partner in a friendly and respectful manner.
