Official page of reincarnation believer/investigator Dr. Ian Stevenson  [This link seems to be broken and his main page is no longer up: Here is an article by Stevenson to get an idea of his work: Birthmarks and Birth Defects Corresponding to Wounds on Deceased Persons]

Note: The critical thinking question for us here (Ghosts, NDEs, Channeling & Reincarnation) is not "is there an afterlife?" but rather "Can this evidence for ______ (fill in with above topics) be considered credible evidence for an afterlife of this type?"

What happens when we die? It may remain a mystery. With no claim that anyone has the right answer, here is some information on what people currently believe:

A full 40% of what the world believes: Reincarnation (resources from About.com).

For a majority, Christianity guides their beliefs. See this article on the many different Christian interpretations of the afterlife.