In cases where the child is approaching the start of kindergarten, or will be transitioning to middle school, junior high, or high school, this can be a closer call. Obviously the quality of the school will matter. Fortunately school statistics are readily available, including standardized test scores. The Minnesota Department of Education provides School Report Cards on their website.
3) Contact the New York State Unified Court System's Collaborative Family Law Center. The Center offers free divorce mediation to qualifying couples living in New York City. If you and your spouse are eligible, you may get up to four, 90-minute sessions with program mediators (or six sessions, if you have children). Both spouses must agree to participate. Note: Referrals to divorce mediation will not be made in cases involving domestic violence or child abuse or where one spouse cannot locate the other.
In addition, a finding of irretrievable breakdown must be supported by evidence that either a) the parties have lived separate and apart for a period of not less than 180 days immediately preceding the date of service of the divorce petition; OR b) there is “serious marital discord adversely affecting the attitude of one or both of the parties toward the marriage.” 
Mediation preparation is often limited, as there is no formal discovery. Frequently, mediation begins with a "general caucus" where the parties and the mediator meet in the same room. The mediator establishes the ground rules in an "agreement to mediate." In court-mandated mediation, the court order will often contain or refer to the "rules of mediation." One of the most important mediation rules is the requirement for confidentiality.
For married parties with children born during the marriage, both parties have joint legal and physical custody until the Court orders otherwise. Thus, either parent has the right to take the children, and the other parent has the right to take them back, and so forth. This can lead to a lot of game-playing and tugs-o-war which are obviously harmful to the children.
In equal numbers, prospective clients come to me either excited about a perceived ace-in-the-hole because of the other spouse’s adultery, or worried about his or her own adultery. Neither attitude is warranted. The Courts couldn’t care less about anyone’s adultery in and of itself, or the immorality of it. Half the divorces they see involve adultery. In fact, there’s a very real danger that pressing this issue will backfire, making the accuser appear obsessive and jealous.
The number of times you go to court and see a Judge or Referee depends on local court procedures and whether you and your spouse can agree on issues regarding your children, property and other matters. If you do NOT agree, the case usually takes longer to finish. It is a good idea to get legal advice before finalizing an agreement with your spouse.