How you prepare depends on what issues are being mediated and the approach of the mediator. You can ask the mediator if there is anything you should bring to the mediation. You may take notes but taping mediation is unlikely since communications in mediation are not admissible in court and the goal is to facilitate open communication and problem-solving negotiations.See question
A mediator is a neutral professional who helps faciliate an agreement by providing education, focusing on the issues, exchanging information, and exploring options for settlement. This can occur with parties and their lawyers or directly with the parties themselves. Lawyers who mediate family law issues can also draft and file legal documents on behalf of both parties.