Don't Start With the Getters and Setters

People had already been writing their contacts in their phones. They didn't think of that until it was too late. The getters and the setters are not the part where you should start because you can implement them easily. But if an underlying data model has to change because when you get to sync, it doesn't work anymore. You wasted all that time. Do the hard ones first. That's the big secret of operation model.