I usually have a chat with the person and find out how much he knows about cards. Does he play poker etc, then I hit them with a classic force with an elaborate revelation. However being more focused on mentalism I can use this more effectively as I am not trying to find his card but merely figure out what it is. Then I go onto something like my version of spectator deals CAAN. Finally finishing with spectator cuts to the middle card of a straight flush.
The most important thing in my eyes is making sure each effect flows onto the next even if it may seem a little ambiguous at times.
However I use if I am doing something with a more magic slant. It goes something like this;
Classic Force, just as they take the card say any card as long as it is not the force card.
If I miss then it is ACR
If I hit it is still an ACR but they suspect that I have more than one of the card in my deck, the force then the constant rising.
Finally when they ask if there is more than one of the card in the deck I do a card to pocket to show there is actually none of that card in the deck.
Or Just learn Cameo from Daniel Madison's One, it's a great example of building an effect into a multi-stage routine.