We use activities to reinforce the content that we are teaching. I know you most likely are already using them but I wanted to point out a few things to keep in mind:
Do you have trouble coming up with ideas? Take a look at the Learning Reinforcement Material found at the end of every Lesson Plan in the corresponding Course Management Guide to each Milady Standard Textbook for a list of ideas to use in your classroom. Additionally, there are activities built right into each chapter of the Milady Standard textbooks.