What do you do to secure your classic?

[xmitsu10]

Have searched the board for past threads on this without much luck. While both of my trucks are locked in my garage at home, when I am out with them, I do worry sometimes about theft (these old trucks were easy to steal, no?).

Looking for different security devices such as:
1) Full blown security system
2) Battery disconnect system
3) Steering wheel/brake lock
I'm sure there are many others but want to know what the board members do to secure their truck.