http://bicyclesafe.com: Great tips on how to avoid being hit.
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Security / locking
http://www.kryptonitelock.com/Pages/HowToSecure.aspx
http://www.kryptonitelock.com/SiteCollectionDocuments/PDFs/Lockup/KryPSAlr.pdf
Cycling Fallacies: http://cyclingfallacies.com/en/