Every year we put up the Christmas tree Thanksgiving weekend. It used to be Thanksgiving day as soon as we got home from Grandma and Grandpa whoever's house, but now we have a 7 PM bedtime to think about. We'd pull the tree out of the box (artificial all the way), throw on the ugliest ornaments we could find (you know, the crap you made in kindergarten), and then crawl under the tree and scream Christmas carols at the top of our lungs. Silver bells has always been a favorite.
Not much has changed. We are our all older, but we still come home to put up my parent's tree on or about Thanksgiving day. We still crawl under the tree and scream (last year, Baba was terrified of our, um, singing. This year he thought it was hilarious). And we still find the ugliest kindergarten crap we can find. Pickings were slim this year as my stinking mother has started to throw away/hide some of our "best" work. We'll make up for it throughout the Christmas season by putting various crap (empty beer cans is always a favorite) on the tree.
Nothing like a family tradition to put in you in the holiday spirit.