Hi Matt,
Happy New Year to you and yours, and best wishes for your tour in Thailand. Glad to hear that your groin pain is largely gone -- hope it stays that way.
And, thanks for being so open about Ageing and All That -- we all have to contend with stuff that happens after three-score-and ten. Seeking comfort from friends and family, as well as professional advice, will help, for sure.
On the matter of memory: First, a self-mocking anecdote from twenty years ago, when I was about 58. We were living in South Africa, and I had been out on some errands. I took along a banana as a snack, and returning to the house, tossed the banana peel onto the kitchen counter & my car keys into the composting bin.
In a more serious vein, a year or so ago I heard part of an interview with a woman named Lisa Genova, then based in New York. The subject was her recent book,
Remember: The Science of Memory and the Art of Forgetting. One brief comment she made on indicators has stayed with me: If you have trouble remembering proper nouns -- place names, somebody's name, and so on -- don't worry about it, they'll pop up sooner of later. But, if you have trouble remembering the names of day-to-day items, that's an important signal, and you should seek professional help.
And again from my own long experience, happily confirmed a few weeks back by my physiotherapist: He said that making lists, and especially,
writing down items by hand, can be a big help in managing your days/weeks/etc. Here, I readily admit to confirmation bias: I still have my Daytimer agenda wallet issued by my employer in May 1982, and I renew the daily/weekly schedule every year. I don't bother with the calendars in my phone or laptop, and wave away suggestions about being an OWF (Old White Fart).
Cheers, mate.
John