Cameron Diaz diversified her skill set a few years ago, and since then, she’s been giving us priceless advice on how to live a better, healthier life (physically and emotionally). Her last book, “The Body Book” offered a holistic, long-term approach to making consistent choices and reaching a long, strong, happy, healthy life.

Now, the 43-year-old actress is sharing what she's learned about aging well in her new publication, “The Longevity Book.” “As we get older, there are phases of life that we enter into and I was entering the phase of 40. I started getting a lot of questions about, was I scared to turn 40?” Diaz said on “Good Morning America.” “I started asking...why should I be afraid?”

Diaz and her co-author Sandra Bark tapped into a lot of scientific research to understand how women’s bodies age. "What I learned is that aging is really about living," she added. "I feel very grateful that I get to turn another year older because not everybody does. Not everybody gets to grow old."  

The stunning actress explained that this book aims to help women take responsibility of their own bodies and give out advice on how to stay ahead of the game. If not, Diaz believes one becomes “sickly, and old and broken instead of being full of life until the end of it.”

However, Diaz does insist that there’s not just one secret to living well. “There's a basic way of doing it and it's called living. It's how well you live; how well you take care of yourself. There are five pillars of wellbeing. It's good nutrition, good movement of the body, good night's sleep, stress release and meaningful, connected, loving relationships.”

Last year, the actress also told Cosmo UK that one of the keys to living a lengthy life is having sex regularly. “It’s something healthy that we need to be doing for many different reasons.”