The best place is always the most obvious and in your face. Short of putting it out on display, make a piece of art. Or a container of some kind. Put it right on your desk. Leave it there for a while with nothing in it. If asked, call it art. Once asked wait a little bit longer. One day you will be able to tell if it was looked at. Eventually move it to the side of the room like on a dresser or drawers. Then surround it with other mundane items. CD's, books etc.. dont bury it though. You've now created a stable object that everyone knows about but doesnt think twice on.
We call it conditioning.
It's also why parents eventually stop asking you how your day at school was if all you ever say is.. "FINE"
Enjoy!