Five centenarians share their secrets to a successful life and retirement: 'I refuse to think old.'

Diane Volz, Jack Weber, Helen Juanita Glover, Barbara Fleischman, and Margaret Vaccaro are all centenarians. Diane Volz/Jack Weber/Helen Juanita Glover/Barbara Fleischman/Margaret Vaccaro Centenarians shared their life advice, emphasizing long-term investments and staying active. They stressed…