It's no secret that retirement planning can seem like a dizzying process. At the same time, however, what it really boils down to is incredibly simple: Spend less than you earn, and invest the difference. Wash, rinse, and repeat.

Two weeks ago, Motley Fool contributor Brian Stoffel offered up a very simple and practical way for just about anyone to retire in under 20 years. The article garnered a lot of positive attention from readers, but many were confused by a chart offered up at the end of the article.

In the following video, watch as Brian explains how by simply saving 5% or 10% more of your salary every year, you could be shaving years off your wait to retirement.  

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