Retirement - looking for savings ideas

Retired a little over a year ago, wife still works for now. Waiting for SS at 62, nine months away. If it still is intact.

Anyway age matters a lot because of Soc. Sec. (62) and reverse mortgage (65).
The simple answer is to cut expenses by eliminating debt/interest on debt. Which you mentioned already.
If you have any bank savings accounts gaining minimal interest, move to the newer style accounts that get around 2%. Then you can still get to your money easy and at least get some return.
Put the yearly max in separate IRAs for you and your wife. That amounted to a $14k tax deduction in 2019 for us. If you can afford it. I know we won't be repeating this year.
Possibly convert home equity into cash and make it work for you. If you know about that stuff, but seems that is a job in itself. One I don't enjoy.

just a few ideas I've been thinking about...
Work part time for hobby money or find an inexpensive hobby like reading...lol. Under the table cash is the ultimate.
Make goods at home and sell them for cash. Evaluate your skills. I'm working my way up to making small wooden items like birdhouses, magazine racks, planter stands, etc. People snatch that stuff up around here.

Oh and last but not least, finish the car at any cost! That is your legacy.