Pay off your mortgage.
Eliminating your mortgage is one of the best ways to make retirement more affordable because it removes a sizable monthly bill. While you'll still have to pay taxes and maintenance costs for your home, those expenses are likely to be a fraction of your mortgage payments.
Downsize your home.
Once your children are independent, you will likely no longer need a several-bedroom house in a good school district with a large yard that can be expensive to maintain. Consider downsizing to a smaller home in a less-expensive neighborhood, and add the proceeds of the sale to your nest egg.
Move to an area with a lower cost of living.
Where you live plays a big role in how much you pay for food, taxes and a variety of other services. Moving to an area where the cost of living is significantly less could allow you to spend down your retirement savings more slowly.
Sell a vehicle or go carless.
If you and your spouse commuted to separate places each day, it is likely that you each needed a car. In retirement, you might be able to get by with one car, thus eliminating the insurance, gas and maintenance costs of the second vehicle. In walkable communities with good public transportation, you may even be able to get by without a car in retirement.