a basic rundown of effect.
get audience member to shuffle an ID and select a card.
get said audience member to place that card in the deck the wrong way round
put cards back in invisible box, which you place in pocket.
"what was your card madam?"
"5 of diamonds" Yawn sigh (well thats what i get off my missus).
make deck appear and low and behold her card the six of whatever is mysteriously the wrong way round.
bow to thunderous applause

there you go no methods involved and write your own patter.
