I just spotted this garland tutorial at the Tory Burch blog. It seemed simple, yet festive. Great idea if you need a group project to add that extra splash of holiday to the decor!
Hostess with the Mostess
Or perhaps if you're preparing for a New Year's Eve party, look to My Little Jedi online magazine for a plethora of great party decor ideas, including my personal favorite of how to make a tassel garland. There's also a few Christmas decor articles included, if you're still lacking in the festive food/decorations department.
Now go forth and decorate!