1. ID things you have not been able to do while at work.
(Read War and Peace - backwards; learn a ξένη γλώσσα.)
2. (I have heard it's good to) do volunteering for 1 or 2 periods a week.
...
...
n. Enjoy it.
PS: Add near the top of the list...
- Keep away from financial advisors of any sort (so long I had almost forgotten: their advice is
inevitably how to feather their own nests at your expense)...
- Do not subscribe to any sort of annuity (for the same reasons)...
- Eschew funeral funds - keep you own...
And add to the list in penultimate position...
- n-1. Keep healthy.