I've felt about 22 for decades. Probably until my mid forties, I felt I was only about 19. That leads quite often to the situation where you are looking in shock at some elderly, bald person in the mirror while thinking "Who's that old bastard?". Or the sudden realisation "My God! I'm only two and a bit years off 80!" As the article says, there's a difference between the age you feel you are 'in your head' and the ag…
Same. Once I started seriously considering retirement, admittedly a bit early-ish relative to the usual 65-70, the internal mental model of self has started to shift pretty dramatically, and the hypothetical "I have a lot of things i want to do" plans for the future now have the annotation "and a lot of them need to be done while I am still relatively young enough for them to be plausible." That has honestly shifted…
Do those things that are 'on your list' as soon as possible. There is an old saying 'Life is what happens while you're making other plans'. I discovered that I had, in practice, a mere six (6!) years in retrospect where it was possible do do things that were 'on MY list. If you miss that window of opportunity, you'll never get to do your list at all.
You have to make to effort to fit them in while you can. One of my lifelong dreams was to spend a year or two in a small village in France. The first time it was a possibility was in 2003, but 'No, I have the responsibility to make us a living' meant that that chance was lost and so eight years went by - lost opportunity - until I finally made it to my village in France in 2011 but by then I could only spend time there in bits and pieces rather than as a single block of time.
My "window of opportunity" closed at the end of 2016, though I wasn't aware of that fact till about 3 years later.
Many times I have said to my wife, "If only we were 10 years younger, we could have ... bought an apartment in Paris ... or a house in Italy, or .......". Lost opportunities by the score.