4 Simple Ways to Fix Your Retirement Savings

Half of Americans aren't on track to generate enough income to cover essential expenses in retirement, according to a recent survey by Fidelity Investments.

Of course, that means that the other half is mostly on track. The question is, do know whether you're on the right side of this 50-50 divide?

Before you answer, check out the following four red flags, each of which could be a sign that you need to review your retirement planning right now.