When you buy a property you have the option of renting it out and earning money every five minutes. That five minutes is real-time, which means you don't even have to be playing the game in order for the time to pass. Better yet, you can set the clock of your 360 system forward and reap the benefits—try setting the system's clock forward a year and the next time you turn on the game you'll earn rent for a full, real-time year.

According to user Dargus, this glitch might not work. The game seems to set a cap of how much gold can be earned offline, and once five-hundred minutes has passed, your money growth will permanently stunt. Keep this in mind when attempting this technique.