Aloha Sue,
You would dowse your business space as you would your home. Follow the course steps and place the cures.
As for your health, you can ask yes/no questions of the rods, however, be sure to check in with your physician regarding any changes in diet and exercise. You can also do the same "checking" she does in the video on yourself in the mirror. ask your questions regarding the body of the person in the mirror, rather than calling it your body.
Much Love,
Shawn