Avoid the old Master style twist dial locks. They can be quickly opened with a soda can.

I use a self coiling On Guard cable lock. It used to have a lighted dial, but that has gone bad years ago (or maybe I never replaced the battery). The plastic over the end of the lock mechanism has fallen off. It doesn't compromise the lock, but looks funky, and a couple of wires stick out.



If you're locking anything of any value, get at least a 1/2" thick cable. NEVER LEAVE YOUR BIKE CHAINED TO A POST OVERNIGHT. My bike gets used for errands, but I'm not locking it outside for commuting or for long periods at school, at least not now.

So, make sure your lock matches your riding and your environment.