<< Sixty years or so left, Help! I don't want to die!! What can I do? >>
I can't tell if you are serious or not. In case you are: A healthy awareness of your own mortality can help prevent you from taking life for granted, but don't dwell on it too much. Death is nothing to fear. There is nothing you can do about it so accept the inevitable and make the most out of your short time here.
If you still cannot shake that fear of death try making up an afterlife to ease your anxiety. A variety of blissful fantasies about heaven have successfully placated billions of people since the dawn of recorded history so pick one and maybe it will work for you, too.