Once the kids are gone, it's a natural reaction to want to exchange your house for a smaller one.
Brandriss advises against acting on that impulse.
"The costs of buying and selling a home, only to do it again during retirement, may cost you more money," he said.
Instead, review your insurance coverage and look for places to save. If you had children on your auto insurance, remove them. If you had an umbrella policy or are paying a big premium for a multimillion-dollar life insurance plan, you may not need it if your kids are gone and your house is mostly paid off.
Once you shore up your finances, it's time to start planning for the freedom and fun that come with that empty nest.
More from Retire Well:
How to ask for a flexible retirement
Downsizing your life can eliminate clutter and free up some cash
Using the 'new kid on the block' to save for retirement