Why are you concerned with aging? It's a natural part of life, fighting it can surely only rob you of the enjoyment of it. Stay healthy, of course, but not because aging is a bad thing, it's just a thing. Staying active in body and mind is good advise so you have a better quality of life regardless of age, but I don't think you should see it as a combative measure
It's not aging itself, so much as the various (unhelpful) patterns that people fall into over being squeezed through teh funnel of life
I look forward to aging and prefer to set myself up for success. Keeping in touch with my inner child is a source of strength since I think it's a crucial element in becoming whole which is the best way to age.
Keeping in touch with your inner child seems vague, can you elaborate?