Since moving into town and getting my ipod stolen from my (possibly unlocked?) car, I habitually lock my car doors every time I'm getting out. Which is fine, ex

Since moving into town and getting my ipod stolen from my (possibly unlocked?) car, I habitually lock my car doors every time I'm getting out. Which is fine, except when I'm just running up to someplace and not actually parking. I locked myself out a few times before I got into a routine of very deliberately putting the keys into the same pocket every time and telling myself I have them. Which is great, except for the time I got a phone call as I was leaving the car and forgot the keys in the ignition. Gotta stick to the routine for it to work!