I do magnetic fingers, heavy card and the 2 pens crossed and stuck together. then I go into the hand to eye fixation. Then wait till the eyes fixate or twitch and push their head doe slightly and it worked once out of 5 people.
What I am driving at is using magic effects as "STRONG" convincers. I saw an actual "Hypnotist" use OTL once. First he did magnetic fingers, and some other prep stuff. Then he had the subject write down her name and a random number to 1000. He handed her, her signed business card with the number that she wrote down. He then did some phony induction mumbo jumbo snapping his fingers and said, "you are going to forget the number you wrote and convince yourself that you wrote an entirely different number...what number did you write?"
She says her number and then he tells her to look at what she wrote. Undeniably she has written a different number than she though she did. At this point she is convinced that she already has been hypnotized. From there he went straight into a handshake induction.
So the moral of this story is CHEAT! You better your odds that they will go into an actual induction if they think they have already been hypnotized. And if the induction doesn't go as well as you planned...so what? You walk away with at least one strong hypnotic effect.