Co-parenting is the most common choice for custody-sharing after divorce in the modern courtroom, extenuating circumstances notwithstanding. However, despite the many noted positives of co-parenting, it can be a difficult situation for parents who do not get along very well. Fortunately, there are ways to create a co-parenting relationship that prioritizes the kids. According to Helpguide.org, developing strong communication skills is key for navigating co-parenting. 

It is a good idea to converse about the kids and only about the kids. Particularly if you have a difficult relationship with your ex-spouse, leaving your personal issues to the side is key. Focusing on the children will help you keep the communication professional and not de-evolve into your personal matters. 

Additionally, making all of your communication written will help. You may wish to limit your communication to email-only, as this way your missives can be more professional. Even better, there will be an electronic paper trail, and this will ensure that nobody is confused about what was agreed upon when. It can be easy to drop verbal communications at times, and this can lead to arguments. Depending on the nature of your relationship with your ex, you also may wish to put limits on the amount of times that you contact each other per week or per month. 

You may also find it advantageous to do the custody exchange away from your houses. Sometimes it is better to exchange in a public venue like a library or restaurant. 

In worst-case scenario, you can resort to having your communications filtered by somebody else, but this is not recommended. It increases the chance of miscommunication.