Strive to be the very best dealership. Take pride in your product and honor your obligations in reguards to warrany work and problem resolution. Making a customer feel you have their best intrest in mind is not too hard to do, after all repeat business and word of mouth go a lot farther in growing your business.
Train your staff, from the detailer to the parts guy, the mechanic to the finance officers.and last but not least adopt a no haggle price structure that everyone can live with. You dont see me trying to haggle with the baker over a loaf of bread!
In todays world we all know the ways dealerships generate more profit with add ons and number manipulation. Thats a pretty weak approach and one that will lose this customer forever.
I guess the bottom line is …. Just be smart enough to sell cars.