Be natural and use your head.
Most magicians consider the palm an easy move to make. They are inclined to believe that they are 'getting away with it,' when they are in fact fortunate enough to have a polite audience.
What the eyes see, the heart must believe.
How are you coming into the effect? How are you getting out?
The mind is led on, step by step, to defeat its own logic.
A good magic effect should easily be described in one sentence.