My key survival tip for the holidays is that actually (for me at least), it is just one day. After that, life takes over again, and even if we're travelling the focus on family and children shrinks quickly back to normal levels, which we can deal with. It is just one day. We can cope with a lot for just one day.
A few months ago, when we had my niece Charlie staying, we went to the movies. Moana, the new Disney movie, was advertised, and Charlie informed us that she really, really, really (!) wanted to see it. (In general, New Zealand and Pacific kids are very excited about this, because it represents a Pacific culture they can relate to.) I wondered aloud when it was going to start.
"Boxing Day!" she declared confidently. Then she looked at me. "I have no idea when that is!"
Roll on Boxing Day.