If a sim lives on a business lot, (Shop, Resturant, Vets etc) what do you do with their home lot?

I did this once and I kept getting so frustrated with myself that when I wanted the sim to go "home" I would click the house button on their icon out of habit, but what I really wanted was for them to go to their business. So I kept forgetting to have them use the phone to travel to the location instead.