Dying before you grow old enough to get cancer does the trick. Remember to reproduce before that.
But I also think ancient Romans would not lay in a tanning booth, or be indoors for 10 months and then take a 7 day trip to Mexico and burn to a crisp on the beach.
https://www.curemelanoma.org/about-melanoma/melanoma-statist...
The idea that everybody died young is a myth.