Heaven has been held out as your eternal reward for all the things you have done while on Earth—and for not doing the things you were "not supposed to do." So you have decided that there must also be a place for people who have not done good things, or who have done things they were not supposed to do. You have called this place hell.
Now I come to tell you this: There is no such place as hell.
Hell is a state of being. It is the experience of separation from God, an imagining that you are separate from your very self and cannot be reunited. Hell is forever trying to find your self.
What you have called heaven, too, is a state of being. It is the experience of Oneness, the ecstasy of reunification with All That Is. It is the knowing of the true self.
There are no requirements for heaven. That is because heaven is not a place that you get to, it is a place that you are in, always. Yet you can be in heaven (Oneness with All) and not know it. Indeed, most of you are.
This can be changed, but not by something you are doing. It can only be changed by something that you are being.
This is what is meant by, "There is nothing you have to do." There is nothing to do but be. And there is nothing to be but One.