Do you use a storage locker?

My wife has become addicted to watching the television show “Storage Wars”, where professional 2nd hand dealers bid on abandoned storage lockers. Some of the finds are amazing, others are just clutter.
It seems people abandon very expensive items. Have they just lost track of them? Did they forget about the locker?
Do you use a storage locker? Do you keep track of what you have stored? Do you have a back-up plan so that, should you die or go to jail, someone keeps up the rent? How often do you go back to it?
Have you ever bid on an abandoned locker? What did you find?