Their are two main views of the afterlife, depending on the group of Christians you are looking at. Many believe that when you die, you go to either haven or hell and will spend eternity there.
Other groups believe that we rest until Christ return, and our souls will be brought back and judged. In other words, when we die, we dont go to heaven or hell at death. They believe your soul returns to God, who (in a loose matter of speaking) hold into it until judgement.