First and foremost, maintain a household inventory. This can be done with etching equipment that is usually available, on loan, from your insurance company or local police station. You can also purchase this type of equipment in a hardware or locksmith store. Engraving is especially important if any of your possessions are stolen and eventually recovered. You should also record the serial numbers of any electronic or computer equipment.
Some insurance companies offer discounts for installation of any of the above devices.
Check with your agent, broker or insurance company sales representative about whether you can take advantage of such a discount.