The First Signs of Christmas

Hooray for the holidays! I finally began decorating my house today. I don't know what's been holding me back (read laziness), but the nativity has arrived. I coveted this particular nativity for several years and was shocked when my mom surprised me with the entire scene before last Christmas. I was sad to put it away last year and am happy to have it back. Well, I'm in for several more hours of decorating, but my favorite show is on tonight, so I am ready! What is your favorite decoration? When do you decorate for the holidays? How long does it take you?