Albert Einstein reportedly called compound interest the 8th wonder of the world.

We call it "your golden ticket to financial independence."

With three numbers and the right attitude, you can reach financial freedom with the help of compound interest and a long time horizon.

If you do it right, you can take less than what you'd spend eating out for lunch in a month ($200) and over time turn it into a half a million dollar nest egg for your retirement.

We explain how on our YouTube channel and give you the tools to make it work for you — with tips on budgeting, pitfalls to watch out for, and most importantly, some ideas on where to invest the money you're saving away!

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.