I love this thread. I fantasise about this now that I am nearing retirement, actually not. I am early 50s but a girl can dream.
First I will step down from my senior role and take a mid-senior part time role so that the buck stops with my boss (how I would relish that, woohoo!) and focus on training, supervising juniors and taking on the complex work but training someone up to do it now that I have more time. This is a good thing because my job is broadly combatting financial crime and my way of giving back but still keeping my foot in a private competitive organisation so I stay sharp and on top of the latest developments. Intellectual stimulation and sense of belonging.
Then I will step down further and do a part time course in creative field (perhaps digital animation or games art). My job has always been so cerebral - I can do it almost entirely on a laptop and a phone. It will be delicious to actually create something. I loved that as a child but the inconvenience of earning a living in a well paid job put paid to that.
I would volunteer, not in a foodbank, but using my legal and writing skills. Dh however tells me that I will greatly dislike working with the general public and I am inclined to agree.
So then I will read voraciously and do flights of fancy in my head. I will clean, tidy and organise - makes me happy. And cook, bake and go for fancy meals with dh.
Happy as a clam. Cannot wait.