NEW YORK (TheStreet) -- No, saving for retirement isn't daunting.

A plan of action, coupled with the right tools at your disposal is key, experts say.

The fact is, too many American's aren't keeping retirement top of mind. Some 21 million people aren't saving for retirement at all, according to a Bankrate survey.

Here are three tools bound to pave the way to a financially sound retirement.

1. Index Funds

When basketball star Lebron James asked billionaire investor and Berkshire Hathaway  ( BRK.A)  CEO Warren Buffett for investing advice, Buffett suggested index funds.

Index funds have low fees and track the major stock indexes like the broad S&P 500, essentially guaranteeing diversification.

Experts say index funds in a Roth IRA, an account that invests after-tax dollars -- as opposed to pre-tax dollars, which is the case in a 401(k) account -- is the winning combination for retirement, especially if you have time on your side.

"You don't find those hidden costs with index funds, like you do with mutual funds," said Richard Paul,
a certified financial planner and president of Richard W. Paul & Associates based in Michigan.

If you have a 401(k) from your employer, it's likely full of mutual funds.

"But index funds can be a great investment for a Roth IRA as long as you have two things on your side; time & discipline," he said. "Remember, if your portfolio loses 50% you have to earn 100% to get back to even."

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