Warning the cabin crew about the imminent crash IS INDEED A PRIORITY.
You can forget all the rest, the checklist, the gear, the flaps, but SHOUTING loudly in the PA, yes SHOUTING Brace for impact, is a must, and easy to remember and to do.
I think flying the airplane in such circumstance is by far the easiest thing to do, quite easy in fact.
Applying the correct procedure is the real challenge, in every situation.