If we're talking true to life, then nothing beats an in person session with a large amount of physical maneuvering. Whether it be the sharp tug on the arm as your senses freefall into a daze and you adhere to the command of "SLEEP!" or a gentle brush on your brow or temples helps melt that last bit of stress away.
I tend to perform more than receive in this way but it's a great and gentle way to maintain a session. Normally I like to hold hands and trace my thumb on their palm, lock eyes and speak gently. Perhaps I'd switch to passive speak because it makes a subject feel more at ease as they follow along with my words. Maybe I'd assure them that trance is just a gentle feeling which might grow at the front of the mind or even the back sometimes, much like the feeling of wanting to see how a dream ends on a cold winter morning when you are calmly wrapped in warm toasty blankets.
I could start to blink a little heavier or slow my breathing... My sentences... My tone soft and soothing...
Maybe I'd gently grip their hand and test to show how light it had become, how limber and relaxed a subject could become in a few short seconds... Maybe I'd tell them to imagine magnets drawing the hands up, still guiding and circling with my thumb, before droppi g the arm and the subject and guiding them to the ground or the back of their chair.
That's my favorite way to hypnotize, anyway. It's effective enough, for me anyway.