Want to know the secret to a long life?

My 92-year-old grandma had her theory, and I have mine...

As my grandma moved into her 90s and continued to live fairly independently, I asked her what she thought might be the secret to a long life.

“Everything in moderation,” she said.

For her, this meant one small glass of red wine in the evening - she’d been told this was good for her heart - balanced meals, enough exercise and keeping herself busy, but not …