I am not sitting in a chair watching the world go by, I just got back from doing repairs at my brothers, car repair and house repair. I go to the YMCA for exercise 3 days a week, never the less, what I can still do today is vastly reduce to what I could do just 3 years ago, when I was felling trees, and rebuilding an old building.
Point is you don't know what the future holds for you, I never thought I would see the decline I have. I can no longer rise from a chair without using my arms to assist me getting up. My wife, who is 8 years my senior, can do it no problem.
I am writing this, not for your pity, but as a warning to those who have grand plans that they hope to do when they can retire, I hope you can, but you can't count on it. Do it while you can, if you have continued great health, you'll have great memories, while making more, if later you can not, you at least got to do it when you could, not lament that you now can't.
I try and keep my hand in helping others where I can, in their projects, even if it is done from a keyboard. I still learn things every day by "keeping my hand in" even if I don't do the work myself.
My mind doesn't recognize my bodies limitation, and it may kill me trying to do what my mind knew I could in the past.
I have an outer CV joint boot to replace, I"ll feel great if I can get it done in one day. I don't even want to know what "book time" is on the job, it no longer applies to me.