I told her I'd give her a simple example and pulled out a quarter (when pulling out the quarter with my left hand, I grabbed two, one between my fingers, the other in the fist of the same hand). I took the quarter from between my fingers into my right hand and gave it to her. Had her do the "pick any hand", told her which hand it was in, and she asked me how I knew. I pointed at my cheek and said "give me a kiss and I'll teach you".
She did her little gigle and kissed my cheek. This launched me into a little monologue something like this: "You have to think about the problem on an emotional level, blank out the disruptive thoughts trying to confuse you, and rely on a gut feeling, deep down inside you, that lets you know what to do. If you dont act on your instincts, you will choose wrong and your one chance will be gone." At this point I took back the quarter (in my other hand, no quarter), and said "here, you try". Hands behind my back, pretended to mix, brought both hands out.
Now I said something like "ok, now relax, see the problem but consider it deeply, let your mind blank with the only focus being your answer, let your spontaneous side drive you."
Course, you have a quarter in both hands, so it's not too hard for her to pick the "right hand". Once she's done that say something about "see, it's easy to get what you really want, if you act on your instincts".
While saying this, take the quarter in your open hand (that she chose), put it in your other hand, and put both quarters back in whatever pant pocket your closest to. I also made a joke about how she was a quick learner, and that we needed to go to las vegas together.