You can always do what some girls from my dorm did. They couldn't have a tree, either, but they found an awesome solution. They cut out a tree from paper, taped it to the wall, then cut out ornaments to decorate it. Even better, they went so far as to make a paper fireplace and stockings as well. It was so much fun walking into that apartment and having that bit of cheer to see! ^_^

As far as flavors go, I just discovered that egg nog with whip cream is really good!