Also, don't accidentally leave your fob in a windshield bag! I almost did that once... I had forgotten that I had put it in there when performing service at home. MEGA-STUPID!
I had a tricked out '87 Camaro IROC-Z stolen from a movie theater in Sacramento back in 1989. It was parked right in front of the theater, under a light, and was locked with the security system activated. The sheriff, who found it 48 hours later completely STRIPPED, told me that a good thief can defeat OEM security systems and steal a car in under a minute. That may not be true anymore, but when I am traveling I also carry one of those heavy chains with brightly-colored vinyl around the chain, and I put it through both wheels and through the frame overnight. It's a hassle, and may not prevent a thief from making off with the bike... but it will slow them down a bit, and just seeing it might make them move on to another, less-secure-looking vehicle.
I am also considering the Lo Jack system for both bikes. It's not cheap, but it's a tiny fraction of what I have invested in our bikes. Having had a vehicle stolen, I can tell you that it's gut-wrenching. I basically got enough for the IROC to pay it off... then I had to come up with the down payment on another vehicle.
You can also carry an additional insurance rider that will reimburse you for the cost of upgrades you've installed - so if your bike is stolen and not recovered, you can get money back for what you actually have in it.