I used to be very afraid of death because I knew that after death I would face God's judgment and I also knew that I hadn't always obeyed God's commands. For a long time I tried to make up for my failures by living a good life but I was always afraid that I hadn't done enough. My fears ended when I discovered that Jesus Christ had died to pay for my sins and I could be forgiven if I put my faith in him. Here is a good place to learn more about this:
http://www.backtothebible.org/Indexes/index.php?option=com_mosforms&Itemid=180
I am 70 years old so I am constantly aware of the fact that my life could end at any time. When I read the obituaries in the newspaper it isn't unusual to find that most of those who have died are younger than I am. But I don't have any fear of this because I know that I have been forgiven and I am ready to face God.