I've had a lot of mileage out of "
Travelling Aces" (attributed to Charlie Nagle) which is in this book. I first learned it from Garcia and Schindler's
Magic With Cards, where the same effect is called "Aces Follow Aces" .
In this effect, three aces "travel" from one pile to another. I perform it as a transposition effect, by having a spectator hold the pile with the aces in his hands, and then reveal the aces to have travelled to a completely different pile. Very easy to perform, very fun, blows people away, and nobody has ever guessed the method, despite its bold simplicity.
You'll find a long and very helpful discussion with suggestions of favourites from this book
here. Some of the tricks mentioned most often include: Scarne's Drunken Poker Deal, Future Deck, Miraskill, Upside Down Deck, and One Deck You Do As I Do.