Death is scary to think about for anyone. It is not enough to say just try not to think about it, I know. Although you will never like the idea of dying you will be able to come to terms with it. You will have to do some soul searching and perhaps look into your religion. For most people the main fear of death is the unknown. But have faith in knowing that perhaps we are not meant to know.
Some thoughts I have heard worked for others is realizing that yes death is inevitable and part of the "plan". Everyone dies and a place where everyone goes can't be that bad, can it? Some people view their heaven or after life, depending on their religion, as a place where everyone is, a place of harmony and balance, a more natural state in a sense. Many religions believe this living world is sort of a training ground, just a step in our journey. To many, life is just the beginning.
Personally, there is a quote that has a lot of meaning for me but you can understand it or disregard it; Alberta Einstein once said energy doesn't die it just changes forms. How I understand that is we are energy; therefore we cannot die we will just change to another form. If you really think about it a natural life and a natural death can be beautiful. We are all part of this world and the world has a plan for us. We shouldn't be scared because it is natural and has a purpose.
Try to think of every day as a precious gift. Enjoy each day to the fullest. We only have a short time on this earth. Who knows what we will enjoy in the next life but for now appreciate this world.