Lynn McCary Thomas  McCary’s Jewelers Shreveport, La. Co-owner mccarys.com    What is your single best money-saving initiative?  We’ve been in business for 75 years in various locations. We started in downtown Shreveport, then we moved into the first shopping mall in north Louisiana. Currently we’re in a strip mall, where we’ve been for 30 years. But after all these years, we’re building a freestanding store. And that will be a good move for us financially. My son, Miles Thomas, is in charge of the new store and creating a really innovative environment. We always wanted to own our own lot and building because we knew that would be a savings in the long run.    What has been your most memorable sale? This speaks directly to our philosophy as a business. The day before Christmas one year, a man came in with his teenage children,