Well,
We are all energy, correct? Something has to happen to that energy when the physical being ceases to exist. I believe that the spirit, or energy that is "us" leaves us and is born again in another new being. That belief is not popular with most of the people I know, but you know that? I don't care, and it makes more sense to me than any other teachings I learned in church while growing up.
It seems to calm my soul to know that I will go on... rather I know it or not, and not to some mystical "heaven, or hell," but into another being, for another chance to live life to the fullest. That, my friend makes me really happy!!