My groomer suggests putting the dog up on a small counter or table and "pretend" that you are cutting his hair or nails. My guys don't like heights and will stay pretty still because 1) there isn't really any room to move around and 2) it's too high to jump off! Jac was trained this way and Beanie is in training...and has a ways to go! Treats also help a lot! Yorkies are smart dogs and it takes a long time to gain their trust in un-natural situations. Jac now stays still because he knows the sooner I finish the sooner he can get down and play!
Beanie, my squirmy-wormy, still kicks and screams! Good luck!