Don't keep your title, identification or credit cards in your car.
Know your license plate number and keep your Vehicle Identification Number (VIN) with your business records.
Hide your business cards or address stickers with your name on them in places such as under the hood of your car, the floor mats or the seats. Also drop them in window channels inside the doors. Another option is etching your VIN on one or more windows.
Be sure to call 911 and report your car stolen as soon as possible. Be willing to assist in prosecution.