augustwest that is awesome, get there a bit early if possible, say a little prayer asking simply for the ability to chair the meeting in a manner that will help others & then just trust that all will go well. Try a little meditation before hand as well.
Just trust & have faith that how ever the meeting flows that it flowed to fulfill his will and not yours.
I chaired last night, it was an awesome meeting and to be honest I can take no credit for it being an awesome meeting, I simply did my part.