We have a 50' sailboat. When I forget where I put something I stand in the middle of the boat and tell myself that it's within 25 feet of me.
It helps,,, I still can't find it though.
Pamela doesn't need to put things in the same place all the time, You do! If Pamela can't find something it's her problem because it will be her stuff. Just make sure all your stuff is where you can find it.
The cell phone? Damn, I have the same problem with my wife.. She doesn't answer it most of the time. Of course, neither do I.