I had a health scare (all fixed up now), so set up a "disaster" plan for my wife showing:
-a list of all our accounts and where we keep passwords
-a cash flow model showing when we would spend down checking, savings and taxable bonds.
-what order to draw on various accounts
-when to claim SS on her benefit vs. my survivor benefit
-when she should claim a survivor benefit I have on tiny pension
-when to switch from COBRA to ACA and which years to keep income low for ACA
-when and how much Roth conversions to do
-a financial model to provide comfort that the money will be OK
-tips about IRMAA tiers and ACA cliffs
We retrieved our will, read it and found a possible gap - we had never done medical powers of attorney for each other. So we downloaded forms on line and had them notarized, made copies and returned the originals to the safe deposit box.
Since my wife normally has zero interest in all this, I made her do a Roth conversion, made her move money from Vanguard to checking, showed her where to look to know if stocks/bonds need to be rebalanced and how to do that. I went through our IRAs and Roths and simplified them to be either US Total Stock Market + Total Bond Market or those plus Total International stock to make things as simple as possible.
Another gap I found was I checked contingent beneficiaries on our IRAs/Roth IRAs and added the words "per stirpes" after our kids names. As I understand it, without that, if one of our children passes before DW and I, our grandkids from our deceased child would not inherit the IRA/Roth IRA, it would all go to our surviving child, regardless of the will.
One issue I could not fix is that unfortunately our taxable account is a mess with lots of funds, but also with big existing capital gains that I don't want to take, so that's still an issue.
We discussed that our house is almost too big for the two of us and would be crazy for just one to try to heat, cool, maintain, pay taxes on, insure, etc., so I budgeted for one half the medical costa and a 20% reduction in other expenses (smaller house, one car, one phone, along with flood, clothing, and personal needs for one).
Overall, it was a good exercise and I recommend making a plan and discussing it before you need it. No one will be thinking straight if disaster strikes.