The count force is more designed for children since it is so simple and easy to figure out.
Start by memorizing a card, say the Four of Clubs, and shuffling it to the top of the deck.
This creates the illusion of shuffling, even though you're really helping yourself out.
Have the spectator pick a number between 1 and 52. If he says 12, then place the first 12 cards, one by one, into a new pile. These are all face down.
Give the spectator the new face-down pile and have him repeat the action.
He will now reverse the order of this pile from 12-1 to 1-12, meaning that the last card he touches will be the original top card of the deck.
Tell him to pick up that card and memorize it. He will think it is completely random, when in fact, it is exactly what you wanted him to do.