Although this video is primarily about Home Invasions it contains some good information about home security measures (locks, alarms and video systems) as well.
It is well worth the seven minutes viewing time. The presenter, Massad Ayoob, has been a highly regarded self defense expert for decades.
[ame=http://www.youtube.com/watch?v=JGe_G3HDKFQ]Massad Ayoob on Home Invasions - YouTube[/ame]