Sure! Here are complete sentences using the provided words and phrases:

1. If you want to maintain a well-balanced life, you must give priority to your work.
2. If we want to balance life and study, it is important for us to manage our time effectively.
3. If teenagers are satisfied with their lives, they may usually be happier in their relationships.
4. If you do not make sufficient time for your schoolwork, you may fall behind in your classes.
5. If you want to stay healthy, you should eat less junk food and take more exercise.