Want to retire early? People who have done so already say to focus on 3 expenses
"If you learn how to master those big expenses, it will free up a ton of money so you don't have to stress about the small stuff," said one early retiree.
Maskot/Getty Images/Maskot <ul><li>Business Insider has spoken with dozens of early retirees.</li><li>Rather than focus on cutting back on small things, like coffee, they focus on 'the big three.'</… [+4202 chars]