Question of the day: How do you "harvest" cards?

First of all, I sign up every time I go into a casino, and ask for an extra.

Next I walk around and look for "loose cards" (ones that have been forgotton or abandoned) They can be found on top of, or in between machines.

Cards that are in the card reader should be taken with care. The user may be close by and cause a fuss. What I do is sit down at the machine and play a few coins, then get up and take the card with me.

I always remember that "the eye in the sky" is watching, so I never do anything that looks "suspicious" or bothers any other player.

This has worked for me as I have harvested thousands of cards from hundreds of casinos, and have never been approached by security in any of them.