Step 1: Ensure everyone in your extended family, from the grandparents to the baby, systematically succomb to a vicious, violent stomach flu throughout the course of the week.
No further steps necessary. Following Step 1 above virtually guarantees you’ll allow your kids to attend Christmas Eve candlelight service in jeans and sweatshirts, eat oatmeal for Christmas brunch, and exactly two Pez each for dinner. You will not overeat at any holiday meal, either (you won’t even be required to make them), and you’ll skip that third glass of wine (and second, and first). You’ll forget to take photos and then lose your camera altogether. Christmas light touring in the car will definitely be scratched from the itinerary, and extracurriculars like ski days and ice skating will suddenly be optional. Your kids will go to bed Christmas Eve at 7 pm without a complaint, (though you will still have to choke down those cookies left for Santa). You’ll say yes to six consecutive hours of quality time with the Xbox, and you may even spend Christmas night lying in a heap on the couch, watching a Firefly marathon on SciFi.
(Warning: you may kind of love it.)