Last, but not least, you can cheat a slot machine by making light. Most slot machines in land-based casinos still use a sensor to determine how many coins or bills are being inserted. By interrupting these sensors with a pocket laser light you can make the machine think you're inserting coins or bills while you aren't.

Past posting: After a bet is won, a player replaces smaller-denomination chips with large-denomination chips. Hand mucking: Palming desirable cards, then switching them for less desirable cards that the gambler holds. Using a "holdout" device to remove a card from the game until needed at a later time.