Whenever I get a replacement credit card or credit card, I cut my old card up into four pieces. But I make sure not to throw the pieces away all in the same place.
One piece goes into my household trash. I'll dispose another piece in the kitchen trash at work, another piece gets surreptitiously slipped into a trash can at the gym, and the last piece in a garbage bin at the Light Rail station.
I'm making dead drops all over town like Brad Pitt in "Spy Game."
And then two months later I'll get contacted by the fraud department telling me that my card number's been compromised.