Where Is The Best Place To Hide The “Elf On The Shelf”?

The "Elf On The Shelf" has arrived at my house, and my daughter LOVES it. Its our first year having it, and I love the attention she gives it. Plus its a GREAT tool for convincing your child to continue good behavior. This is the only problem I see coming: creativity, every day I have to find a new spot to hide this elf, and I've already started so I have another 40 days left!

Does anyone have the "Elf On The Shelf", and if so, some good creative ideas would be appreciated.