Mark all of your kit with an ultra violet pen so if your house gets robbed you have a good chance of getting your kit back should the police find someone dealing is stolen goods.
Totally invisible & permanent.
The best bit about it (if you are insured) is the handler will get an extra charge per stolen item & also they dont get to keep what they nicked if the police cannot prove your stuff is stolen. (yes..... Goods get returned to the thief if the Police cannot prove the item is stolen)
Just bought one & will mark all the £3000 worth of electronics in the house.
Dont forget 3.3% Quidco