We are going through the same thing, except with a SAH spouse (me). And ours might be next week, Merry Christmas! Or else sometime in January.
We aren't doing much of anything yet except the obvious "try not to spend much". We already have things pretty much as low as we can go without major sacrifice, so there isn't much different to do, really, except wait and panic ;). Our house will likely go on the market in Jan. if it happens, as we will likely relocate (one major employer in the area, otherwise its an hour commute).