Meet Mr. Money Mustache, The Man Who Retired at 30

"By the time you get to be a big fancy adult with a career and a house, your daily routine is basically just a collection of unconscious habits: You make coffee, commute by car, attend meetings and answer e-mails, shop in certain stores, watch TV and repeat. It becomes effortless. Your brain goes into autopilot. Unfortunately, this also means it becomes hard to make changes."