According to the National Center for Education Statistics, 20.4 million U.S. students are attending college this fall.

With the average cost of undergraduate tuition, fees, room and board standing at $16,757 at public institutions, $43,065 at private nonprofit institutions and $23,776 at private for-profit institutions, collegian's financial budgets will be tight, and extra cash hard to come by.

The good news? There are multiple ways for college students to save money, even on campus, that gives them more financial leeway throughout the school year - if they're diligent and creative about finding good ways to save money.

Some college students have already tapped into that cash savings vibe, and they advise other students to get on board.

"I paid my way through college by running a house-painting business and teaching piano," says Andrea Miller, founder of near St. Louis. "Now I blog about entrepreneurship for young music teachers. It's helped me graduate nearly debt free and get a head start on a career."

There are plenty of other ways to earn and save money while in college. Here are some of the best ideas:

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