Here’s a great video by Carlton Reid, produced for Northumbria Police. It shows genuine bikes being stolen by genuine thieves, as well as some tip-top advice for how to Lock Your Bike [.co.uk] and avoid this pain yourself:
Read more on Quickrelease.tv’s page for this film, which also features two other excellent videos employing the skills of an extremely good-looking model.
Filed under: Bike locking strategy, Bike security tips, How to lock your bike, Video



This video was pretty helpful. I also used a link http://www.bike-locks.com/article_the_basics_of_locking_a_bike.aspx
There definitively are right and wrong ways to lock your bike using the U-Locks so make sure that you do your research before leaving your bike unprotected. Especially in shadier neighborhoods.
This is how you should not lock your bike:
http://www.gilka.co.uk/2009/08/02/how-not-to-lock-your-bike/