I just finished reading a Lifehacker article about a software product called Prey. You can use this software for free or choose the paid version. I have not tried this software yet but I will install it on my MacBook Pro this weekend.
Prey tracks your laptop or Android device in case it is stolen. You can read more about Prey at their website. This is a good idea for mobile devices as they are easily stolen from libraries, colleges, universities, or coffee shops to name a few places.