One piece of advice that I learned really can make a difference is that the folks involved besides the person at the center of this sort of thing, must make sure they're taking care of themselves and each other. You get family and friends who burn themselves out under these sorts of circumstances early on and later, when they are really needed as things really get tough, they're in no condition to be of help. For very practical reasons make sure that you and all involved are taking care of themselves, getting enough rest, just getting away from the pressure for some down time. Everyone involved is needed too much (and are too precious themselves) to not be available because they're down for some reason.
Good advice.