Christmas Decor: DIY (simple) advent calendar using wooden clothes pins, paint, and a discount frame. More info here. Really simple. Could also be used to hang holiday cards, and later as a calendar that holds important dates/times.
Super fun and kid-friendly. Cinnamon Stick Tree Ornaments.
Christmas card using ribbon, easypeasy. More of a Merry Christmas than Happy Holidays.
Natürlich schöne Weihnachtszeit
Sparkle & Mine: School Sparkle: DIY Crafts to Deck Out Your Dorm Room!
DIY Can Lamp. I think the bottom is covered with a yogurt lid? And filled with a small strand of some cheap Christmas lights? :) Two of these on either side of my headboard would rock!