I think if you come to terms with this life, and grow in spiritual development, that you have nothing to fear when death comes. By connecting to positive energy in this life, you will be drawn to positive energy in the next life.

Also, as a variant of Pascal's wager, if you leave a positive and spiritually developed life in this realm, and if there is no other realm after death, you will at least have lived a fulfilled and happy life.

I do not fear death, because I am comfortable and happy in this life, and I know that death is coming at some point. I may die when I am 90, or I could die in a car wreck tomorrow on the way to work. However, since I feel that I have tried to be as positive as possible, and do good to others, in this life that if there is an afterlife I will have a positive one, and if there is no afterlife, then I lived a good life while alive.