Requires: An ordinary deck of cards and a bit of practice for a casual presentation.
Effect: A deck of cards is thoroughly shuffled, after which a card is selected and replaced in the deck, which is then squared up and placed on the table.
Four cards are then thrown out haphazardly on the table and one is chosen. The number of spots on this card is then to denote how far from the top the selected card is to appear. Upon counting down from the top, the selected card is found at this number.
And self-working! You can do this!