Locking Strategy

I think that method should be fine. Keep in mind that what a U-Lock really does is buy you time - about 45 seconds worth because that's about how long it takes to pick on average.

An anti-theft skewer may seem like a good idea but you gotta remember whatever can be put on your bike can be taken off. I would at least get another lock to secure the front wheel too.

Again, the main purpose of a lock is to buy time. Most experienced bike thieves will know how to open a lock without a key. Thus, two locks will take more time to steal and thus there will be a greater chance that you will run into the thief and be able to stop him.

Keep in mind that the act of stealing a bike looks exactly like unlocking a bike so a lot of people won't notice even if the thief is in plain sight.

Anyway, the best thing you can do to prevent theft is proper bike placement - if you have a regular commute do not lock the bike in the same place each time - this makes it seem like the bike has been unattended.

Place your bike next to a more vulnerable looking bike. Given a choice, a thief will steal the bike that looks easier to steal. There's usually a poorly locked bike on any given bike rack so park your bike next to that.

Don't leave your bike locked outside "all day." If you can bring it inside the office or let it rest near your cubicle, do that. If you can't do that and have to leave your bike outside that long, make sure the bike you ride isn't expensive looking and desirable, and check on it when you have breaks. I personally use my old bike if I'm commuting.

Lastly, most bikes are stolen from residential areas. So if you're thinking about locking your bike outside the place you live, or keeping it in a garage, don't do it. Keep it inside your house or apartment. Thieves will open garages, climb balconies, etc. Your bike should sleep where you sleep.

Unless the bike is attached to some unmoveable object, all a thief needs to do is toss it in the back of a pickup truck and it is gone. Once he gets where he is going, he has all the time in the world to remove the the locks, usually with a die grinder fitted with a cutting wheel which will make short work of most any lock.