I know this topic is a little controversial this time of year but I'm going to dive in.
Elf on the Shelf.
I've read articles, posts, comments, etc that it is a pain in the ass, sets unrealistic expectations for parents and kids alike and my personal favorite: the game of this teaches our children to live in a "watched" state, desensitizing them to being spied on.
There are many, many things I don't do right as a parent. That is worthy of a whole other post a whole other time. But making this time of year magical for my kids, I've got this. There will come a day that they will be stressed out over the holidays by saying yes to too many things/people/needs. I want them to remember the days when the holidays were fun.
They will only be this little once.