Chances are, your 401(k) plan will play a huge role in your retirement finances -- as it should. So it's important to do what you can to grow your 401(k) balance into the largest sum possible. But failing to make these key moves in your 401(k) could prevent you from doing just that.

It's not a given that your employer will contribute money to your 401(k) plan just because you allocate funds out of your own paycheck. But thankfully, many employers do make a point to match 401(k) contributions. And if you're not putting in enough money to snag your match in full, you're limiting your plan's growth -- not to mention giving up free money.

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Source Fool.com