Vietnam veteran Roger Staubach has had the sort of pro football career - and life - that you can be really proud of. Joining the Dallas Cowboys fresh from his tour of duty with the army, staying with them for all 11 years of his career and winning the Super Bowl an amazing five times during those years. He is one of only four men to win both the Heisman Trophy and the Super Bowl MVP award.
Sensing the end of his career coming, he started the Staubach Company to pursue interests in real estate, which he hoped would give him a strong income in retirement. It did a little more than that. His company grew and grew, and when the time came to sell it to multinational firm Jones Lang LaSalle in 2008, it was valued at $613m. Staubach could easily have chosen to retire, but seems to enjoy his work, remaining with the merged firm as executive chairman to this day.