My favorite close up magic trick is the AMBITIOUS CARD. Everywhere I go I perform it, and people of all ages LOOOOOVE it! Plus, I can do it over and over again, and no one ever gets the clue what's going on :o)
My favorite is the Penny Dime Trick Mini Scotch and Soda...it get them everytime...I suggest kepping two because everytime I do this trick somebody wants to see it again...
My favorite close-up routine is with the Bunny-pen Paddle. I learned the routine by watching Dan the Macy's Magic man "sell" the bunny in hat "paddle" at Macys Toy department and at country fairs. (He is the one who also had the "Coin Board"...Never could do it myself!) His patter and routine for the bunny in hat paddle was stunning, and I was able to master it. Plays well for kids and adults... but best with a kid or two around. Invisible rabbits fly around and are caught in the hat as we explain how a Magician can pull a bunny from the hat. It;s a secret, of course. Do you use the paddle at all? George Minot, Mystic Merrymaker
By far the very best close up effect is deep astonishment. Deep astonishment 2 is pretty great also. If you just upgrade the wallet in DA1 it is an effect that will get you the ellusive "NO WAY!!!"
I would have to say Ambitious Card is one of my favorite. You can perform it almost surrounded. Next would be the Spongeball routine, with this you can pack it and take it with you anywhere.