Shining Stars - simple tape design tree, with star garland. Washi tape would work well for this, as it wouldn't mar the wall paint. I just picked up some wide white washi tape, with "Merry Christmas" printed on it.
Christmas Craft Project: Advent Calendar-- think I'll sew some small, reusable cloth bags, and find a slightly different way to arrange the clothes pins, so that there's more space for the bags. Love the idea of painting the clothes pins, though!