Two of the most commonly used ones are the IRA and the 401(k), and each of those exists in both a traditional and a Roth form. You can open IRA accounts at most good brokerages, w

There's a big difference in the maximum annual contributions allowed in a 401(k) or an IRA, regardless of whether it is a Roth or a traditional account.

Saving for retirement gives people a sense of security and makes them more confident in their future. However, most people don't feel like they've put enough away for their post-work years.

First, learn just how powerful an IRA account can be. Contribute aggressively and invest effectively. And be patient -- for many years. If you have enough time and determination, you can probably become a millionaire.

Roth IRAs are funded with after-tax dollars. Earned income is the key to this question, and the eligibility rule applies regardless of a person's age.