Don't make the mistake of thinking that once a dog learns a skill and performs it consistently for a matter of time, you never have to have practice sessions again. Practicing these skills with your dog as a matter of routine will provide you with a steady opportunity to bond with your dog, and it will give your Yorkie a chance to show off for you. Dogs love to perform for their owners (and for treats), so continued training sessions will be fun for your dog. As time progresses, you can add new skills and teach your dog to perform as many different acts on cue as you like.
The same principles work for almost anything you'd like to teach your Yorkie. Choose a behavior, and think about how you could use a lure to shape it. To have a sitting dog stand up, for example, hold a treat near the dog's nose and then move it a short distance up and away. Or think about marking and rewarding some behavior that occurs naturally, such as lying down in a bed, and then putting it on cue. Continuing training with your Yorkie will keep her mentally sharp and engaged with you.