Jim Hamilton

At Houston's Hamilton Shirt Company, retaining institutional knowledge is all about listening to dad. "The biggest lesson my father taught me, which I try to tell David and Kelly, is to make sure that you understand and you can basically perform all the duties in the shirt company," says former owner Jim Hamilton, whose children now run the business, which has been in operation since Jim's grandparents found it in 1883. Because his father took ill before he was able to teach Jim everything about the family business, Jim has made teaching his children a priority.