Lots of folks pick investments when they first sign up for a 401(k) and don't get around to revisiting their choices. Check that your asset allocation still makes sense, that you're not in high-fee funds that eat away at your returns, and consider some of the newer investment choices in 401(k)s, including target date funds, international funds and low cost collective trusts. Don't overload your account with company stock just because it's available.
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