Most rich people don't spend their time and money trying to impress others, Kay said. "They are not in a race. They know they have made it, so their attention is not on what others think." In fact, many wealthy individuals wouldn't have become rich if they had spent their hard-earned money buying things to keep up with others, he added. Authors Thomas Stanley and William Danko said much the same thing in their 1996 best-seller, "The Millionaire Next Door: The Surprising Secrets of America's Wealthy," writing that a couple of key secrets of the country's richest people are living below their means and rejecting big-spending lifestyles.