We've featured Hu2 Design Stickers in the past but they've added a few I just thought were really clever.
Some of them are more than just decoration, too! They actual serve as reminders to not forget your keys, or which appliance is plugged into which socket, and gentle and funny reminders about using energy. Then of course there are the purely decorative stickers such as the little mouse holes with silhouettes of mini MCM furniture outside and my favorite, "Ceci n'est pas un pomme." for a laptop.
FYI: If you order by December 15th, they will arrive by Christmas!