I must tell you that I have thought of this a lot, I always come back with the same answer.
First of all I would not be able to tell me loved ones that I was going to leave them.. As they would spend my last days feeling pity for me...I would not want that.
Secondly I would make sure my affairs were in order...children and such... I would write a letter to each of them and explain why I never told them of course... They would understand.
And lastly I would spend every moment I had loving and enjoying every breath I had left!
I asked my wonderful husband the same question...
His answer was ... I would spend my last moments making sure my girls would be financially stable and taken care of when I was gone.
I asked him why he would say such a thing and his answer was... Because I would be dead and no longer here to love my girls and take care of you!