My grandpa's birthday is on July 4th. Every July 4th morning for the past I don't know how many years, I meet with him and we either just hang out and chat or we go to breakfast.
My grandpa lives by himself with his two dogs (French Bulldog, Iyla, and Schnauzer, Gipper). He's still very much with it mentally and still drives his car (although no longer at night).
Every year for his birthday he will re-hash with me the things that he does to keep himself in-shape.
1) He dedicates time to walking each & every day.
2) He eats what's on his plate and nothing more.
3) He dedicates time to yard work. Doesn't matter which season it is, he's out there doing something.
Those are the things that he shares with me. Below is how I interpret them.
1) He's physically active each and every day.
2) He's got the whole portion control thing figured out. He doesn't limit himself on what he can eat, but even when he has foods that are typically thought of as "bad" (i.e. pizza, ice cream, etc.) he will only have a little bit and not overindulge.
3) More physical activity, but more importantly he has PURPOSE. My Grandma Coval passed away back in 2014. I'm not going to lie, I was a little concerned that might have a negative impact on my Grandpa's longevity, but he's coped well and continued to find joy in other things in life. He takes great pride in his yard and as trivial as it might seem to you or me, it does give him purpose and there's a lot to be said for that. In fact, he was t-boned in his vehicle a couple of summers ago. This resulted in a few cracked ribs and a fractured sternum. Just hours after the accident, he was asking when he could go home because he wanted to mow his lawn.
The majority of us are going to live for a long-time. With the advances in human medicine and technology it's inevitable. However, what human medicine and technology don't guarantee is that you're living life in your latter years and not just letting the years pass by.
We need to start taking care of ourselves now. I don't care if you're 20 or 70 years old, it's never too late to start.
Move every day. Eat mostly real food. Have purpose and let it guide you.