You may think of taking estrogen as 'not natural,' and that we should accept aging gracefully. But the expectation that most of us will live well into our 80s is unprecedented in the history of the human race. Less than 100 years ago, most women died before menopause. It's really a new thing to have the expectation that practically half your life is without this essential hormone. Second, stay physically active.
Physical activity contributes to healthy aging.
Even people with chronic illnesses do better if they're able to stay active. It contributes to cardiovascular health, reduces the incidence and severity of depression, contributes to good posture and better balance, and helps control your weight. Third, I would urge people to continue to do some kind of work, either paid or volunteer. Keeping your mind active and staying involved with people is very important. I've seen lots of retired people who lose their connectedness.