[audition]

Bill Gates Sr. answered the question this way: I can relate to the answer the late Bruce Bliven, a former editor of the New Republic, was reported to have given when someone asked him what it felt like to be an old man. He said, “I don't feel like an old man. I feel like a young man with something the matter with him.”

How do you avoid, prevent or postpone getting "something the matter" with you? I second what others in this thread have said: attend to diet and exercise, take care not to injure your eyes, ears, back or knees. Diet might be the most important place to start - have a look at https://gamechangersmovie.com/