So, I am updating my address book. Up pops Michael Silva, a very smart independent security consultant in Edmonds, Washington. I verify his web site address. Interesting. It sidetracks me and I begin poking around. I found a gem for you!
Security Of Desks and File Cabinets <-- click
There may be nothing in this brief article you don't already know, but refresh your memory anyway. When it comes to securing information, this topic ranks right up there with shredding and eavesdropping.
Necessity spawns invention...
At the start of my career an executive countered my suggestion that he clear his desk at night. "I have my paperwork in very specific piles. I can't be moving all of them every night."
I invented a desk condom for him. Custom made to fit his desk, it was lightweight ripstop nylon with a drawstring along the edges. Flip it over the desk at night, pull the cord, lock the lock. Simple. Cheap. It worked for him. Kept after-hours snoops away, and kept the cleaners from knocking over his piles of papers. Stored easily, too.
If you get any grief, ask your execs, "Would you leave a stack of twenties on your desk overnight?" ~Kevin
Photo (Click to enlarge.) - My worst case.