Kryptonite New York LS Bicycle U-Lock at work and locking my bike using it. Sometimes, I do an overkill by locking using two locks. It is totally unnecessary, but better to be safe than sorry!
Kryptonite New York LS Bicycle U-Lock is on sale at Amazon (as of 12/26/2010).
How do you secure your bike when you are out and about or at work? Please share your thoughts in your blog or in the comments section. Thanks.