On December first (or the first Saturday in December, as is our tradition for years now) we pack a picnic lunch, load everyone up in a couple cars (there are many of us) and head about an hour away to a Christmas tree farm to find the perfect tree to go at my mom's house (I personally use a fake tree at my own house, less mess :) ). We spend a couple hours running through trees, making abnoxious suggestions and serious suggestions as to which tree we should pick.
After we have decided upon one, each kid gets a turn trying to cut the tree down. After the tree has fallen we take a family picture around the tree.
The whole day is a lot of fun. It is a great way to start our countdown to Christams.