For a quick answer, maybe nothing especial. But I think I could do somethings else, for example I would do every things that I was afraid of doing them, because sooner or later the time would be over, maybe it's worth it, and maybe I would do anything else! Actually I think we can't say it exactly at the moment.

I would contact my loved ones and closed relatives in order to say farewell. Also, I would spend every second I'd have left in the company of those I cherish the most.

I would have spent this day with my relatives and my precious love. I would ask forgiveness for all wrong things I did. I would cry and..

I would take a jet plane and spend all the day flying and spit on this dirty earth

I would search for someone who hurts me, but I still love.