Plot twist - go to a celestial existence which is much nicer than earthly, but still relevant politically and ideologically. Kind of like an archangel.
Regarding time - I'm a hopeless historian, so I never would think of my own life, but the past of civilisations, such as visiting Germany before 1945... Something Savitri Devi never did, and it's as distant now as the Aztecs.
But I never did any mistakes in my life. Or I never lived in the first place. That said, I'd love to experience anew my childhood, I remember it as radiant and brilliant. But then again, any beginning is. Only later greater knowledge and context ruins the picture - see Eliade's painting room impressions.