Do you really know that you're going to die? Just think about it. It is very real. There is nothing we/you/I can do about it. In fact, it's the only thing that is truly present in your life...your death.
Most of us go through life ignoring the fact. Media and institutions play with us and feed us imagery and ideas that make us feel secure in ourselves or allude to some sense of eternal life. However, behind those masks is the mask of death. All those products were killing you all along.
So, knowing you're going to die, what is it you truly want out of your life? Are you going to just go along and do what others want and expect? Are you going to try and express yourself as you truly are, face your death and make something memorable and beautiful that can instruct and help others?
