Personally, I would rather avoid this subject, but I have been working at getting prepared for "that moment", dreading every minute of it. I don't even like to talk about it with James because it saddens me immediately.
But, it is going to happen one day to one of us first and I would rather avoid the chaos of not knowing where things are in our life. It is a discussion that should not be avoided or swept under the rug.
Hopefully you both have Advanced Directives. That is step one.
But let's talk about the not-so-obvious things.
Do you know where the life insurance policy is kept?
Do you have a list of all your assets with passwords/etc.
Do you have a list of all your bills complete with passwords, etc.?
Are the utilities in both of your names?
Do you have a burial plan so that at that moment things go as smoothly as possible?
Do you have a phone list of people to call so you don't fret about notifications or a handwritten letter to send to people that would want to know?
Do you have plans to get a legal pronouncement of death? Ask someone to go with you. You will need this for life insurance, banking, etc. You will need certified copies of death certificates.
Contact your CPA.
Have a list of all your assets.
Do you know how to pay bills on line?
Morbid, but realistic.
I watched my parents pass away and it was very organized and minimized the chaos, especially for our dad who witnessed my moms' passing.
I hope this helps a bit.