ignition live

wheres the best place to steal ingition live from for a stereo
ive got a perminant live but id rather have an ignition live just incase i forget to turn the radio off

cheers
sam

I always thought that the live that is supplied to the stereo was ignition live an not permanent so check to see if there is a redundant ignition live down behind the stereo.

If not heaters or windscreen demister?!