I assume every day IS the last day of my life. I just keep on keeping on and it will be what it will be.
Don Juan (of Carlos Castaneda fame) says "death sits on the mat with you and one day will trick you into looking into its eyes", and death sits on your left shoulder waiting for you. Live life as a Warrior like every act is your last.
I'm not going to put too much energy into worrying about my death. It will come soon enough.