Would you make any changes if you found out that there is, in fact, a heaven and a hell?
Well I know in my heart that there is a heaven and a hell. As a christian I have no doubts about that. But even if there was not, I think the most satisfying thing a person can do is simply try to be the best person they can be. When you try to be a good person and to do what is right in life, you recieve a self satisfaction inside that rewards you before heaven. You know you have done well and you can be at peace about the rest.