I was going over 'what if' scenarios the other day, and one of them happened to be 'what if my laptop got stolen'.
Mostly, there is nothing you can do other than ensure you have good passwords and great backups. However, you can install some software that 'might' help you locate your machine should it fall into the wrong hands.
There are lots of services out there that offer machine tracking and the ability to locate it once stolen. I came across
Adeona which is free and open-source.
I like that.
It comes in two flavours for mac; One with camera enabled, and one without. I opted for the first.
Installation was a breeze and it outputs an encrypted file that you store somewhere safe (not on your machine!). It will then periodically sign in and take a picture (the green light does briefly fire up, but it is very brief). This data gets stored on secure servers and is encrypted to keep you safe.
I attempted the retrieve by running their software and supplied it my special 'OST' file. It went away and recovered the data including a mug shot of me, the IPs (Local and WAN) along with network information (it picked up the names of my routers etc.).
Now this isn't necessarily going to help if your laptop is stolen. Many people may re-install the OS, or the tech savy may check for software like this before launching onto the internet. However, for free, surely it's worth it - just for the 'what if it actually works!' scenario.