One thing that’s helped us with holidays is pushing a culture of sharing stuff here. Shane and I will grab a pack of Reese’s (to use the example above) and split it, one each. We do that with meals out now, too, since portions at restaurants can be so huge. And the kids know that when they come home with a huge treat, like a mammoth cookie, or many treats, like Halloween candy, they either have to halve/quarter it and save the rest for later, or opt to share it with someone else. They’ve almost always opted to share it instead of hoard it. Two birds, one stone, etc.