My best one is lost in my brain, but here are the boring ones...
- Need to entertain the DCs for the last few days before Christmas while you get sorted? Give them a pencil sharpener and their box of pencils - you may need to hoover afterwards but 2hrs+ peace (if you have confiscated the sharpener for the other 364 days )
- Set the dinner table Christmas eve. One less job to do Christmas day...