If your company offers a 401(k) plan, it can be an effective way to save for your future: You get tax benefits, the money is automatically taken from your paycheck before you have the chance to spend it and, often, companies offer a match, which is essentially free money.

Consistent contributions can even make you a millionaire. In fact, the number of Fidelity 401(k) accounts with a balance of $1 million or more recently hit 180,000. These 401(k) millionaires are, "in large part, everyday people that are just taking advantage of that 401(k)," Katie Taylor, vice president of thought leadership at Fidelity Investments, tells CNBC Make It. "You don't need to make a million to save a million."