It's "go time" if you're planning to retire in 2015, or even in the next few years.
As millions of baby boomers flip the switch from gainfully employed to living off their savings, the financial decisions they face are countless and complex.
They must convert their nest egg into income, for starters, and manage their withdrawal rate to ensure they don't outlive their savings.
Read MoreRebalancing mitigates risk
They must also determine when to begin claiming Social Security and whether their asset allocation still reflects their long-term goals and tolerance for risk.
In short, the months leading up to retirement are when the rubber meets the road.