You have had terrific advice IMO from several posters. I just wanted to suggest a book, The Divorce Mediation Handbook, that lays out literally everything you should be thinking about. It is organized in useful categories, and you could use it to help set up your "agenda" for the meeting. I used it a great deal, even though I had an attorney who participated in the mediation.
I strongly agree with the advice to get a consult from a L. Also, even if you believe the mediated deal is terrific for you, please pay to have an L look it over once for you before you sign.
Best of luck, this is a hard time, especially when we SO want the other person to take charge of this stupid D that we don't even want.
