id say a russian roulette type idea, i know it may seem as a cheap bitta drama to some but...
iv ended my stage show with roulette with a prediction ending and it plays very well.
I guess it depends on your character? what kind of stuff were you thinking? 
a Confab is always nice.
theres a nice confab/ seven keys to baldpate idea in barrie richardsons "Theater of the mind" that im trying to work into mine now.
gotta love John Archers dvds for a bitta comedic insperation. 
im of the opinion (i guess being a magician who does a lil mentalism) that if your many a mentalist and you perhaps sprinkle a few tiny magic effects it can enhance the mentalism, by showing "look what at the amazing things i can do with these props, but now i am stripping them away, NAKED-ness" (not litterally ofcourse  

  WELL UNLESS??) 
But yes these are my little opinions.. or perhaps just the jibbered ramblings of a madman!!  
 
 take care and good luck with the show
(just reading now that your new to mentalism, hay mate any help give us a PM  BARRIE richardsons books, the classic steps to mentalism, i love reading bout old routines and the old masters they are great for a bitta inspro!!)