Here's a novel idea to protect your belongings. It's called DataDot and it consists of a sand-like dots that are each encoded with a unique serial number belonging only to you. Smear the dots all over your stuff and if they're stolen and recovered, police can access the DataDot database and reunite you with your lost belongings.
All we've got to say is that we tried it out and all of our stuff is still here. Coincidence?