"FI" is an acronym that has steadily grown in popularity over the last decade, though the concept is much older than that. It stands for financial independence -- some people call it early retirement (the longer acronym FIRE stands for financial independence, retire early) -- but the idea is simple. Live below your means, drastically increase your savings rate and accumulate enough wealth to "retire" or perhaps better said, until you can do what you want to do.

Time and savings rate are the key components of financial independence. What if you could save half of everything you make? What if you started doing that from the beginning? Jesse shares some lessons he's trying to instill in his kids as they take their first steps toward financial independence.

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