There is good news and bad news on aging:

The bad news is there is no "quick fix" or magic bullet when it comes to aging well. "Generally speaking, the better you treat your body throughout your life, the better your aging experience will be," said Dr. Mercola.[1] For example, a lifestyle that includes exercise and a well-balanced diet will slow or minimize many problems related to aging. 

The good news is later life tends to be a golden age, according to psychologists. Most people get happier as they grow older.[2] According to University of California psychologist Dr Susan Turk Charles, mental wellbeing generally improved with age, except for people with dementia-related ill health.

References

1. Dr. Mercola

2. People 'get happier as they age'

3. Why Do We Age and What to Expect?

4. Aging—Knowing the Basics