We confess, we're suckers for pom poms! They're easy to make, and for those without a DIY-bent they're available in inexpensive kits from Martha Stewart Crafts (also a great resource for DIY favors, rubber stamps, labels, and wedding accessories, including one of the only print-at-home program and place card kits we've seen!). You can also get great paper lanterns in a rainbow of colors at Pearl River.
Of course, we're fans of getting creative and trying out mix-and-match colors and shapes, per this gorgeous combination by Rebecca Thuss. Lovely!