13 strategies to save a fortune, from real people who retired before 40

Flickr / Daniela Contrary to popular belief, you don't have to win the lottery, inherit a windfall, or even earn a Wall Street salary to retire early. Consider "Mr. Money Mustache," who averaged a $67,000 annual salary working as an engineer for 10 years before announcing his retirement at age 30. Or Jeremy Jacobson and Winnie Tseng, whose combined annual salary of $135,000 was enough to retire in their 30s with a multi-million dollar net worth. To help you get started on the road to early ret...