Emily Larlham's video is really excellent in showing how to teach "touch", particularly in her timing. In training your dog anything, your timing is critical. And in order to get your timing down, you have to see it done.
In the meantime, here's a visual cheatsheet for "touch."
In the meantime, here's a visual cheatsheet for "touch."
Don't forget to click and treat right when your pup taps his sweet cold nose to your hand. Timing is everything!