Originally Posted by wrafl

I lock my bike all the time even when it's in the garage. I carry a lock with me most times and ensure it's locked when I enter a grocery store or restaurant. I would never take a chance leaving the bicycle unlocked. On my Dahon D7, I usually take a rear bag where I keep the On-Guard U bolt and cable lock and BTW it's one of the LBS recommendation for brand. It is quite expensive but then a good deterrent against theft.