Act as if the desired outcome will happen, as if the MC session will go well, as if you will be OK regardless of the outcome. That kind of thing. Easier said than done, I know.
I hope that your session with the MC goes well tomorrow, and that you have a very pro-marriage counselor.
H: 44, Me: 45 Married: 20 y Together: 25 y no kids Walk away: 12/15 Asked for temp separation 12/25/15 PA confirmed 3/16 (apparently neither the first, nor the last PA he has had) H filed for D 5/16